Pediatrics
Final Professional MBBS — Pediatrics. Complete question bank: Long Questions (10 marks) and Short Notes (5 marks) across all 15 systems, with clinical pearls, drug doses, staging tables, mnemonics and key-point recaps.
15chapters180questions108High-Yield
DEFINITION
Growth is the progressive increase in the size of the body and its parts (a quantitative change), whereas development refers to maturation of functions and acquisition of skills (a qualitative change). Growth is one of the most sensitive indicators of a child's health and nutritional status, which is why growth monitoring is central to child health care.
FACTORS AFFECTING GROWTH
- Genetic — parental height/build, sex, ethnicity; determines the growth potential.
- Nutritional — the single most important postnatal factor.
- Hormonal — growth hormone, thyroxine, insulin, and sex steroids (at puberty).
- Antenatal / intrauterine — maternal nutrition & health, placental function, intrauterine infections.
- Chronic illness — cardiac, renal, GIT, respiratory disease impair growth.
- Socio-economic & emotional — poverty, deprivation and neglect retard growth (psychosocial dwarfism).
LAWS / PATTERNS OF GROWTH
- Growth is a continuous but not uniform process — rapid in infancy, slower in childhood, and accelerating again at puberty (the adolescent growth spurt).
- Different tissues grow at different rates (Scammon curves): neural tissue grows earliest, lymphoid tissue overshoots then regresses, general/somatic tissue is sigmoid, and genital tissue grows late.
- Growth proceeds in a cephalo-caudal (head to toe) and proximo-distal (centre to periphery) direction.
- Catch-up growth — after a growth-limiting illness is corrected, a child grows faster than normal to return to its original growth curve.
PARAMETERS OF GROWTH — WEIGHT
Weight is the most sensitive index of recent nutrition and health:
- Average birth weight ≈ 3 kg (India ~2.8–3 kg).
- Physiological weight loss up to 10% in the first week, regained by 7–10 days.
- Doubles by 5 months, triples by 1 year, quadruples by 2 years.
- At 3 years ≈ 5× birth weight; at 5 years ≈ 6× birth weight.
Age Weech's formula for expected weight 3–12 months (Age in months + 9) ÷ 2 1–6 years (Age in years × 2) + 8 7–12 years (Age in years × 7 − 5) ÷ 2 Age Average daily weight gain 0–3 months ~30 g/day (≈ 750–900 g/month) 3–6 months ~20 g/day (≈ 600 g/month) 6–9 months ~15 g/day (≈ 450 g/month) 9–12 months ~10 g/day (≈ 300 g/month) PARAMETERS — LENGTH / HEIGHT
Length/height is a better index of chronic/long-standing nutrition (measured lying down < 2 years; standing ≥ 2 years):
- Average birth length ≈ 50 cm.
- Gains: 1st year ~25 cm (→ 75 cm), 2nd year ~12 cm (→ 87–90 cm), 3rd year ~9 cm, then ~6–7 cm/year till puberty.
- Doubles birth length (~100 cm) by 4 years.
- At 2 years, height ≈ half the eventual adult height.
PARAMETERS — HEAD CIRCUMFERENCE (HC / OFC)
Reflects brain growth; measured as the maximum occipito-frontal circumference:
Age Head circumference Birth ~34–35 cm 3 months ~40 cm 6 months ~43–44 cm 1 year ~46–47 cm 2 years ~48–49 cm Adult ~55–56 cm Increment: ~2 cm/month (0–3 mo), ~1 cm/month (3–6 mo), ~0.5 cm/month (6–12 mo).
💡CLINICAL PEARL: At birth, HC (35 cm) > chest circumference (33 cm). They become equal at ~9–12 months, after which the chest exceeds the head. A chest < head circumference beyond 1 year suggests undernutrition.BODY PROPORTIONS — US:LS RATIO
The upper-segment : lower-segment ratio (lower segment = top of pubic symphysis to floor) assesses proportion:
Age US : LS ratio Birth 1.7 : 1 3 years 1.3 : 1 7–10 years 1 : 1 Adult ~0.9–1 : 1 A high ratio suggests short limbs (achondroplasia, untreated hypothyroidism, rickets); a low ratio suggests a short trunk (spinal dysplasia).
FONTANELLES & DENTITION
- Anterior fontanelle: diamond-shaped, ~2.5 cm at birth, closes by 9–18 months.
- Posterior fontanelle: closes by 6–8 weeks.
- Temporary teeth: eruption begins ~6–7 months (lower central incisors first); ~6–8 teeth by 1 year; all 20 by ~2.5–3 years. Rough rule: number of teeth ≈ age in months − 6.
- Delayed dentition (no teeth by 13 months): rickets, hypothyroidism, hypoparathyroidism, Down syndrome, malnutrition, familial.
ASSESSMENT OF GROWTH — ANTHROPOMETRY
- Weight-for-age — underweight (acute + chronic).
- Height/Length-for-age — stunting (chronic undernutrition).
- Weight-for-height — wasting (acute undernutrition) and overweight.
- BMI-for-age — overweight / obesity / thinness in older children.
- MUAC — quick screen (1–5 yr): < 11.5 cm = severe, 11.5–12.5 cm = moderate acute malnutrition.
- Head circumference and skinfold thickness (body fat).
GROWTH CHARTS
- Serial measurements are plotted on growth charts — the trend/velocity is far more informative than a single reading.
- WHO Standards (2006) for 0–5 years; IAP charts for 5–18 years.
- The MCP (Mother & Child Protection) card in India uses WHO standards.
- A curve that flattens, falls, or crosses centile lines downward = growth faltering requiring evaluation.
📝EXAM TIP: A child below the 3rd centile but growing parallel to it may be a normal small child (familial); a child crossing centiles downward is pathological until proven otherwise.BONE AGE & MID-PARENTAL HEIGHT
- Bone (skeletal) age — from an X-ray of the left hand & wrist (Greulich-Pyle / TW methods); distinguishes constitutional delay (delayed bone age) from familial short stature (normal bone age).
- Mid-parental (target) height: Boys = [(father + mother height) ÷ 2] + 6.5 cm; Girls = [(father + mother height) ÷ 2] − 6.5 cm.
🔑KEY POINTS TO REMEMBER- Weight: doubles by 5 mo, triples by 1 yr, quadruples by 2 yr.
- Length: birth 50 cm → 75 cm at 1 yr → doubles (100 cm) by 4 yr.
- Head circumference: 35 cm birth → 47 cm at 1 yr; HC > chest until ~9–12 mo.
- Weight = recent nutrition; height = chronic nutrition.
- WHO charts 0–5 yr, IAP charts 5–18 yr; trend matters more than a single point.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; WHO Child Growth Standards; IAP Growth Charts.DEFINITION
Development is the progressive acquisition of skills and maturation of function (a qualitative change). A developmental milestone is a skill that most normal children achieve by a certain age. Development is assessed across four domains and reflects maturation of the nervous system.
PRINCIPLES / LAWS OF DEVELOPMENT
- Development is a continuous process from conception to maturity.
- It follows a definite sequence (cephalo-caudal & proximo-distal — head control before sitting, sitting before walking).
- It progresses from generalised (mass) to specific responses (whole-hand grasp → fine pincer grasp).
- Primitive reflexes must disappear before the corresponding voluntary skill appears.
- The rate varies between children, but the sequence is constant.
THE FOUR DOMAINS
- Gross motor — posture and large-muscle movement.
- Fine motor & vision — hand skills and manipulation.
- Language & hearing — speech and comprehension.
- Personal-social / adaptive — self-help and interaction.
A. GROSS MOTOR MILESTONES
Age Milestone 3 months Head control; no head lag on pull-to-sit 5 months Rolls over 6 months Sits with support (tripod) 8 months Sits without support 9 months Stands holding on; crawls / creeps 12 months Stands alone; walks with one hand held 15 months Walks independently; creeps upstairs 18 months Runs; climbs stairs with help 2 years Walks up/down stairs (2 feet/step); jumps 3 years Rides tricycle; alternates feet upstairs; stands on one foot 4 years Hops on one foot; goes downstairs alternating feet B. FINE MOTOR & VISION
Age Milestone 4 months Reaches for objects; hands to midline 6 months Palmar grasp; transfers hand-to-hand 9 months Immature pincer grasp 12 months Mature (neat) pincer grasp; releases on request 15 months Tower of 2 cubes; scribbles 18 months Tower of 3–4 cubes; turns 2–3 pages 2 years Tower of 6 cubes; imitates vertical line 3 years Tower of 9 cubes; copies a circle; draws a head 4 years Copies a cross; draws a person (head + limbs) 5 years Copies a square & triangle C. LANGUAGE & HEARING
Age Milestone 3 months Cooing 6 months Monosyllabic babble (ba, da) 9 months Bisyllabic babble (mama/baba, non-specific); understands 'no' 12 months 1–2 words with meaning; 'mama/dada' specific 18 months 8–10 words; points to body parts 2 years 2–3 word sentences; ~50 words; uses 'I/me/you' 3 years Full name, age & sex; understood by strangers 4 years Tells stories; counts to 10; knows colours D. PERSONAL-SOCIAL / ADAPTIVE
Age Milestone 2 months Social smile 6 months Recognises strangers; enjoys mirror 9 months Stranger anxiety; waves bye-bye; peek-a-boo 12 months Comes when called; drinks from a cup 15–18 months Feeds self (spills); removes a garment 2 years Handles cup well; asks for food/toilet; parallel play 3 years Dresses with help; dry by day; shares toys 4 years Dresses/undresses fully; cooperative play; toilets alone 💡CLINICAL PEARL: High-yield anchors: Social smile 2 mo · Neck holding 3 mo · Sits without support 8 mo · Pincer grasp 9–12 mo · Walks alone 12–15 mo · Single words 12 mo · 2-word sentences 2 yr · Tricycle & copies circle 3 yr.DEVELOPMENTAL QUOTIENT & ASSESSMENT TOOLS
- DQ = (Developmental age ÷ Chronological age) × 100; DQ < 70 suggests significant delay.
- Screening tools: Denver Developmental Screening Test II (DDST), Trivandrum Developmental Screening Chart (TDSC), Baroda Development Screening Test.
- Diagnostic tools: Bayley Scales of Infant Development; Developmental Assessment Scale for Indian Infants (DASII).
DEVELOPMENTAL DELAY & REGRESSION
- Delay = failure to reach milestones at the expected age (> 2 SD below the mean).
- Global Developmental Delay (GDD) = delay in ≥ 2 domains in a child < 5 years.
- Regression (loss of acquired skills) is always a red flag — suggests neurodegenerative / metabolic disease.
⚠️DANGER / REMEMBER: Always adjust for prematurity (use corrected age) up to 2 years, and check hearing & vision in any child with delay — especially speech delay.🔑KEY POINTS TO REMEMBER- Four domains: gross motor, fine motor, language, personal-social.
- Anchors: social smile 2 mo, neck holding 3 mo, sits alone 8 mo, walks 12–15 mo.
- Pincer grasp 9–12 mo; 2-word sentences 2 yr; tricycle & copies circle 3 yr.
- DQ = developmental age/chronological age × 100; correct for prematurity to 2 yr.
- Regression (loss of skills) is always a red flag.
📝CLINICAL / APPLIED POINTS- Assess development in 4 streams; a delay in ONE stream may be isolated (e.g. hearing → speech).
- Always give the milestone as a range and correct for prematurity up to 2 years.
- A child who was normal then loses skills (regression) needs urgent metabolic/neuro workup.
- Vision fixing-following by 6 weeks and a social smile by 6–8 weeks are early screening milestones.
- Use a validated tool (Denver II/TDSC) to confirm a clinical suspicion of delay.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; Denver II / TDSC / DASII tools; IAP guidelines.DEFINITION
Short stature is a height below the 3rd percentile (or below −2 SD) for age and sex, OR a height velocity below the 25th percentile sustained over ≥ 6–12 months, OR a height significantly below the genetic (mid-parental) target.
💡CLINICAL PEARL: A child growing at a normal velocity along a low centile is usually a normal variant; a child with a declining velocity crossing centiles has a pathological cause until proven otherwise. Growth velocity is the single most important parameter.A. VARIANTS OF NORMAL (commonest — proportionate, normal velocity)
Feature Familial Short Stature Constitutional Delay Family history Short parents Delayed puberty in a parent ('late bloomer') Bone age Normal (= chronological age) Delayed (< chronological age) Puberty Normal timing Delayed Final adult height Short (as predicted) Normal (reaches target) B. PROPORTIONATE PATHOLOGICAL SHORT STATURE
- Undernutrition — the commonest cause worldwide.
- Chronic systemic disease — CKD, congenital heart disease, chronic liver disease, malabsorption (coeliac disease), IBD, chronic infections (TB), poorly controlled asthma, chronic anaemia.
- Endocrine — growth hormone (GH) deficiency, hypothyroidism, Cushing syndrome, poorly controlled diabetes, precocious puberty.
- IUGR / small-for-gestational-age with failure of catch-up.
- Psychosocial (deprivation) dwarfism.
C. DISPROPORTIONATE SHORT STATURE (abnormal US:LS ratio)
- Skeletal dysplasias — achondroplasia (short limbs, high US:LS), spondyloepiphyseal dysplasia (short trunk).
- Rickets and other metabolic bone diseases.
D. GENETIC / SYNDROMIC
- Turner syndrome (screen every short girl with a karyotype — webbed neck, cubitus valgus, widely spaced nipples, delayed puberty).
- Down syndrome, Noonan syndrome, Prader-Willi syndrome, Russell-Silver syndrome.
💡CLINICAL PEARL: Endocrine causes → a 'short & fat' child (relatively increased weight-for-height) — hypothyroidism, GH deficiency, Cushing. Systemic disease / undernutrition → a 'short & thin' child (low weight-for-height).CLINICAL EVALUATION — History
- Birth weight/length, antenatal & perinatal events (IUGR, asphyxia).
- Growth records, age of onset of faltering, height velocity.
- Dietary history; chronic symptoms (diarrhoea, cough, polyuria); drug history (steroids).
- Parental heights & pubertal timing; consanguinity; developmental history.
CLINICAL EVALUATION — Examination
- Accurate anthropometry (height, weight, arm span, US:LS, sitting height) plotted on charts.
- Calculate mid-parental height and height velocity.
- Dysmorphic features, goitre, signs of systemic disease, pubertal (Tanner) staging, fundus & visual fields (for a pituitary tumour).
INVESTIGATIONS (stepwise)
First-line screen:
- CBC, ESR; renal & liver function; venous blood gas / electrolytes.
- Thyroid function (TSH, T4); coeliac serology (anti-tTG).
- Bone age (X-ray left hand & wrist); urine routine / microscopy.
- Karyotype in every short girl (to exclude Turner syndrome).
Second-line (if screen normal / GH deficiency suspected):
- IGF-1 & IGFBP-3; GH stimulation (provocation) tests (clonidine, insulin, glucagon).
- MRI brain/pituitary if GH deficiency is confirmed (to exclude craniopharyngioma).
- Serum cortisol / overnight dexamethasone suppression if Cushing is suspected.
MANAGEMENT
- Treat the underlying cause — nutrition, gluten-free diet for coeliac, thyroxine for hypothyroidism, treat systemic disease.
- Recombinant human GH — for proven GH deficiency, Turner syndrome, chronic renal failure, Prader-Willi, and SGA without catch-up.
- Constitutional delay — usually reassurance; a short course of sex steroids in selected distressed adolescents.
- Psychological support; monitor the growth velocity on therapy.
⚠️DANGER / REMEMBER: Red flags for urgent workup: height velocity < 4 cm/year, crossing centiles downward, body disproportion, dysmorphism, or short stature with features of chronic / endocrine disease.🔑KEY POINTS TO REMEMBER- Short stature = height < 3rd centile/−2 SD or subnormal growth velocity.
- Growth velocity is the single most important parameter.
- Familial (normal bone age) vs constitutional delay (delayed bone age, normal final height).
- 'Short & fat' = endocrine; 'short & thin' = systemic/nutritional.
- Karyotype every short girl (Turner); screen thyroid, coeliac, bone age.
📝CLINICAL / APPLIED POINTS- Plot on the chart FIRST — a low but parallel line is usually normal; centile-crossing is not.
- Every short girl needs a karyotype (Turner) even without classic features.
- Bone-age X-ray separates familial (normal) from constitutional delay (delayed).
- Endocrine short stature is 'short & fat'; systemic disease is 'short & thin'.
- Reassure and observe constitutional delay; treat proven GH deficiency with recombinant GH.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; ISPAE / pediatric endocrine guidelines.DEFINITION
Developmental delay is a significant lag (usually > 2 SD below the mean, or DQ < 70) in achieving milestones in one or more developmental domains. Global Developmental Delay (GDD) denotes delay in ≥ 2 of the four domains in a child under 5 years. Beyond 5 years, once cognition can be formally tested, the term intellectual disability is used.
PATTERNS OF DELAY (a clue to aetiology)
Pattern Likely area involved Isolated motor delay Cerebral palsy, neuromuscular disease, spina bifida Isolated speech/language delay Hearing loss, autism, oromotor problem, environmental deprivation Global delay Genetic/metabolic, perinatal insult, congenital infection, hypothyroidism Regression (loss of skills) Neurodegenerative / inborn errors of metabolism — always pathological CAUSES — Prenatal (commonest)
- Chromosomal — Down syndrome, fragile-X syndrome, microdeletions.
- Genetic / metabolic — inborn errors of metabolism; neurocutaneous syndromes.
- Structural — neural tube defects, cerebral malformations, congenital hydrocephalus.
- Congenital infections (TORCH); teratogens (alcohol — fetal alcohol syndrome); maternal illness.
CAUSES — Perinatal
- Birth asphyxia / HIE; prematurity with intraventricular haemorrhage.
- Kernicterus; symptomatic hypoglycaemia; neonatal meningitis / sepsis.
CAUSES — Postnatal
- CNS infections (meningitis, encephalitis); head trauma; hypoxic insults (near-drowning).
- Hypothyroidism; severe undernutrition; iron deficiency; lead poisoning.
- Severe psychosocial deprivation / neglect; uncontrolled epilepsy.
CLINICAL EVALUATION — History
- Antenatal — infections, drugs / alcohol, maternal illness.
- Perinatal — asphyxia, prematurity, jaundice, NICU stay.
- Developmental history — age of attainment of milestones and any regression.
- Nutrition, immunisation, seizures; family history & consanguinity; prior sibling deaths.
CLINICAL EVALUATION — Examination
- Anthropometry including head circumference (micro- / macrocephaly).
- Dysmorphology — facies, ears, palate, hands, genitalia.
- Skin (neurocutaneous markers) — café-au-lait macules, ash-leaf spots, port-wine stain.
- Full neurological exam — tone, power, deep reflexes, persistence of primitive reflexes, posture, gait.
- Vision & hearing; organomegaly (storage disorders); cardiac exam; eye (cataract, cherry-red spot, KF ring).
COMMON SPECIFIC CONDITIONS TO RECOGNISE
Condition Pointers Cerebral palsy Motor delay, abnormal tone, persistent primitive reflexes, history of asphyxia/prematurity Down syndrome Hypotonia, upslanting eyes, flat facies, single palmar crease, cardiac defect Congenital hypothyroidism Lethargy, feeding difficulty, constipation, large tongue, umbilical hernia, prolonged jaundice Autism spectrum disorder Poor eye contact/social reciprocity, language delay, repetitive behaviour, normal motor Fragile-X Long face, large ears, macro-orchidism, intellectual disability (commonest inherited cause) INVESTIGATIONS (targeted by clues)
- Vision & hearing (BERA) in every child — especially with speech delay.
- Thyroid function; CBC; and a metabolic screen (blood gas, ammonia, lactate, urine metabolic screen) if regression / consanguinity.
- Karyotype / chromosomal microarray; Fragile-X testing; targeted genetic & metabolic tests.
- Neuroimaging (MRI brain) for microcephaly, focal deficits, regression or seizures.
- EEG if seizures are suspected; serum creatine kinase for isolated motor delay (muscular dystrophy).
MANAGEMENT (multidisciplinary)
- Treat the treatable — thyroxine for hypothyroidism, correct hearing/vision, nutrition, treat seizures & infections.
- Early intervention & therapy — physiotherapy, occupational therapy, speech therapy, special education.
- Family counselling & support; genetic counselling; disability certification and rehabilitation services.
- Regular follow-up to monitor progress and detect associated problems (epilepsy, behaviour, contractures).
PROGNOSIS
Outcome depends on the cause, severity and timeliness of intervention. Treatable causes (hypothyroidism, hearing loss, nutritional) do well if corrected early; genetic/structural causes and those with regression carry a guarded prognosis. Early intervention during the period of maximal brain plasticity markedly improves functional outcomes.
⚠️DANGER / REMEMBER: Developmental regression is never normal and mandates urgent evaluation for neurodegenerative and metabolic disorders.🔑KEY POINTS TO REMEMBER- GDD = delay in ≥ 2 domains in a child < 5 yr.
- Causes: prenatal (commonest), perinatal (asphyxia, kernicterus), postnatal (infection, hypothyroid).
- Assess vision & hearing in every case, especially speech delay.
- Treat the treatable (hypothyroid, hearing loss); early intervention improves outcome.
- Regression → urgent metabolic/neurodegenerative workup.
📝CLINICAL / APPLIED POINTS- Take a careful antenatal-perinatal-postnatal history to localise the timing of the insult.
- Examine head circumference, dysmorphism, skin (neurocutaneous) markers and tone.
- Screen hearing and vision in EVERY child — treatable and often missed.
- Thyroid function is a cheap, must-do test (treatable cause).
- Early multidisciplinary intervention during peak plasticity gives the best outcome.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; IAP developmental pediatrics guidelines.DEFINITION
Growth is the quantitative increase in body size resulting from multiplication of cells and an increase in intercellular substance. It follows definite, predictable laws and is a sensitive index of child health.
LAWS OF GROWTH
- Continuous but not uniform — fastest in fetal life & infancy, slower in mid-childhood, then a pubertal growth spurt.
- Cephalo-caudal & proximo-distal direction.
- Different tissues grow at different rates — described by Scammon's curves.
- Genetically determined potential, modified by nutrition, environment and disease.
- Each organ has its own pattern and critical period of growth (an insult during a critical period causes permanent deficit).
SCAMMON'S GROWTH CURVES
Tissue Pattern Neural (brain, HC) Earliest & fastest; ~80% by 3 yrs, near-complete by 6–7 yrs Lymphoid (tonsils, thymus) Overshoots to ~200% by 10–12 yrs, then regresses General/Somatic (height, weight, viscera) Sigmoid (S-shaped) — rapid in infancy & puberty Genital (reproductive organs) Minimal in childhood, rapid at puberty PHASES OF GROWTH
- Intrauterine — the most rapid growth of the entire life.
- Infancy (0–2 yr) — rapid but decelerating; mainly nutrition-dependent.
- Childhood (2 yr–puberty) — steady ~5–7 cm/year; GH & thyroid-dependent.
- Puberty — a growth spurt (sex steroid + GH driven), then epiphyseal fusion ends growth.
CATCH-UP & CATCH-DOWN GROWTH
- Catch-up growth — after a growth-limiting illness/undernutrition is corrected, growth velocity temporarily exceeds normal to return to the original curve.
- Catch-down growth — a large-birth-weight baby of average-height parents may cross downward to its genetic channel in the first 2 years (normal).
💡CLINICAL PEARL: The peak height velocity occurs ~2 years earlier in girls (~11–12 yr, before menarche) than in boys (~13–14 yr).🔑KEY POINTS TO REMEMBER- Growth is continuous but non-uniform; cephalo-caudal & proximo-distal.
- Scammon curves: neural earliest, lymphoid overshoots, somatic sigmoid, genital late.
- Catch-up growth follows correction of a growth-limiting illness.
- Peak height velocity: girls ~11–12 yr, boys ~13–14 yr.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics.DEFINITION
A growth chart is a graphic tool on which a child's serial anthropometric measurements are plotted against age (or against each other) and compared with reference standards, to monitor growth over time. It is the cornerstone of growth monitoring.
STANDARD vs REFERENCE
- WHO Child Growth Standards (2006) — 0–5 years; a prescriptive standard (how children should grow, derived from healthy, breastfed children across 6 countries).
- IAP charts (2015) — 5–18 years Indian children (a descriptive reference).
- In India, the Mother & Child Protection (MCP) card uses WHO standards; the older 'Road-to-Health card' was WHO-based.
PARAMETERS PLOTTED
- Weight-for-age; Length/Height-for-age; Weight-for-height/length; BMI-for-age; Head-circumference-for-age.
- Represented as percentile lines (3rd, 15th, 50th, 85th, 97th) or Z-scores (SD lines).
INTERPRETATION (Z-scores)
Indicator (Z-score) Interpretation Weight-for-height < −2 SD Wasting (acute undernutrition) Weight-for-height < −3 SD Severe acute malnutrition Height-for-age < −2 SD Stunting (chronic undernutrition) Weight-for-age < −2 SD Underweight (composite index) BMI-for-age > +2 SD Overweight / obesity USES
- Monitoring the growth trend — the direction of the curve matters more than a single point.
- Early detection of growth faltering and of overnutrition.
- Screening & grading of malnutrition; assessing response to treatment.
- Health & nutrition education of parents (a visual, motivating tool).
- A key tool in community programmes (Anganwadi / ICDS growth monitoring).
🔑KEY POINT: A flat or falling curve, or one crossing centile lines downward, is the earliest sign of a health/nutrition problem — earlier than any single measurement, and the whole purpose of serial plotting.🔑KEY POINTS TO REMEMBER- Growth chart plots serial measurements vs standards; the trend is key.
- WHO (0–5 yr, prescriptive), IAP (5–18 yr); MCP card uses WHO.
- Z-scores: wt/ht < −2 wasting, ht/age < −2 stunting, wt/age < −2 underweight.
- A flat/falling curve is the earliest sign of a nutrition/health problem.
📚SOURCES: WHO Child Growth Standards; IAP Growth Charts 2015; Ghai Essential Pediatrics.DEFINITION
The Sexual Maturity Rating (SMR) or Tanner staging is a scale (stages 1–5) describing the physical development of secondary sexual characteristics during puberty — breast and pubic hair in girls, and genitalia and pubic hair in boys.
HORMONAL BASIS
- Gonadarche — reactivation of the GnRH pulse generator → ↑ LH/FSH → gonadal sex-steroid production (drives breast/genital development).
- Adrenarche — maturation of the adrenal zona reticularis → adrenal androgens (drives pubic & axillary hair, ~6 months earlier).
SEQUENCE OF PUBERTY
- Girls: Thelarche (breast bud, first sign, ~8–13 yr) → pubarche → growth spurt → menarche (usually at Tanner 4, ~2–2.5 yr after thelarche).
- Boys: Testicular enlargement (≥ 4 mL, first sign, ~9–14 yr) → penile & pubic hair growth → growth spurt (later, Tanner 3–4) → voice change, facial hair.
TANNER STAGES — Girls (Breast)
Stage Breast B1 Pre-pubertal; papilla elevation only B2 Breast bud; elevation of breast & papilla; areolar widening B3 Further enlargement; no separation of contours B4 Areola & papilla form a secondary mound B5 Mature; areola recedes to breast contour; papilla projects TANNER STAGES — Boys (Genitalia)
Stage Genitalia G1 Pre-pubertal G2 Testis ≥ 4 mL; scrotal skin reddens/thins G3 Penis lengthens; further testicular/scrotal growth G4 Penis broadens, glans develops; testes/scrotum enlarge, darken G5 Adult genitalia Pubic hair (both sexes): PH1 none · PH2 sparse downy at base · PH3 darker/coarser/curls · PH4 adult type, smaller area · PH5 adult, spreads to medial thighs.
💡CLINICAL PEARL: Precocious puberty = secondary sexual characters before 8 yr (girls) / 9 yr (boys). Delayed puberty = no breast development by 13 yr (girls) or no testicular enlargement by 14 yr (boys).🔑KEY POINTS TO REMEMBER- SMR/Tanner stages 1–5 (breast & pubic hair in girls; genitalia & pubic hair in boys).
- Girls: first sign thelarche (~8–13 yr); menarche at Tanner 4.
- Boys: first sign testis ≥ 4 mL (~9–14 yr).
- Precocious < 8 yr (girls) / < 9 yr (boys); delayed if no breast by 13/testis by 14.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; Marshall & Tanner staging.DEFINITION
Primitive reflexes are stereotyped, involuntary motor responses present at (or soon after) birth, mediated by the brainstem and spinal cord. They appear and disappear at predictable ages; their persistence or absence is a sensitive marker of neurological abnormality.
IMPORTANT PRIMITIVE REFLEXES
Reflex How elicited Appears Disappears Moro Sudden head drop → arm abduction-extension then adduction-flexion with cry Birth 3–6 months Rooting Stroke cheek → head turns, mouth opens Birth 3–4 months Sucking Object in mouth → sucking In utero 2–4 months Palmar grasp Object in palm → grip Birth 5–6 months Plantar grasp Pressure on sole → toes curl Birth 9–12 months ATNR ('fencing') Head turned → same-side limbs extend, opposite flex Birth–1 mo 5–6 months Stepping Held upright, sole touches surface → stepping Birth 2–3 months Galant Stroke paravertebral skin → trunk curves to that side Birth 2–4 months POSTURAL (PROTECTIVE) REFLEXES — appear later
- Landau reflex — appears ~3 months.
- Lateral propping — appears ~6 months.
- Parachute reflex — appears ~6–9 months; its absence beyond 9–10 months is abnormal (a prerequisite for protective sitting/standing).
CLINICAL SIGNIFICANCE
- Absent at birth → CNS depression, prematurity, or severe illness.
- Persistence beyond the expected age → an upper motor neuron lesion, e.g. cerebral palsy.
- Asymmetry (e.g. unilateral Moro) → Erb's palsy, fractured clavicle, or hemiplegia.
- A useful bedside screen for the integrity of the developing nervous system.
💡CLINICAL PEARL: A retained Moro or ATNR beyond 6 months, or an absent parachute reflex beyond 10 months, is an early red flag for cerebral palsy.🔑KEY POINTS TO REMEMBER- Primitive reflexes are brainstem/spinal; appear & disappear at set ages.
- Moro & rooting/grasp disappear by 3–6 mo; parachute appears by 6–9 mo.
- Persistence beyond the expected age → cerebral palsy (UMN lesion).
- Absence at birth → CNS depression; asymmetry → Erb's palsy/fracture.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics.DEFINITION
Anthropometry is the measurement of the dimensions and gross composition of the human body. In children it is the simplest, cheapest and most objective method to assess growth and nutritional status.
KEY MEASUREMENTS & THEIR VALUE
- Weight — most sensitive index of recent nutrition.
- Length/Height — index of chronic/long-standing nutrition.
- Head circumference — brain growth (0–2 yr most useful).
- Mid-upper-arm circumference (MUAC) — muscle + fat; age-independent 1–5 yr.
- Chest circumference; skinfold thickness (triceps/subscapular — body fat).
DERIVED NUTRITIONAL INDICES
Index Detects Weight-for-age Underweight (acute + chronic) Height-for-age Stunting (chronic) Weight-for-height Wasting (acute) BMI-for-age Thinness / overweight / obesity MUAC (1–5 yr) Acute malnutrition (SAM screen) CLASSIFICATIONS OF MALNUTRITION
- WHO (Z-score): < −2 SD = moderate, < −3 SD = severe, for the respective index.
- IAP (weight-for-age, % of expected): Grade I 70–80% · II 60–70% · III 50–60% · IV < 50%.
- Gomez (weight-for-age): Grade I 75–90% · II 60–75% · III < 60%.
- Waterlow: combines wasting (wt-for-ht) & stunting (ht-for-age) to grade acute vs chronic.
- MUAC: < 11.5 cm severe, 11.5–12.5 cm moderate, > 13.5 cm normal acute malnutrition.
💡CLINICAL PEARL: Field tools: Shakir's tape (colour-coded MUAC — red < 11.5, yellow 11.5–12.5, green > 12.5 cm) and the QUAC stick allow rapid community screening without weighing scales.USES
- Individual — diagnosis & grading of malnutrition and monitoring of treatment response.
- Community — nutritional surveillance, surveys, and targeting of intervention programmes.
🔑KEY POINTS TO REMEMBER- Anthropometry: weight (recent), height (chronic), HC (brain), MUAC (acute).
- MUAC < 11.5 cm = severe, 11.5–12.5 = moderate acute malnutrition.
- Classifications: WHO Z-score, IAP, Gomez, Waterlow.
- Shakir's tape & QUAC stick are quick field screens.
📚SOURCES: Ghai Essential Pediatrics; WHO growth standards; IAP / Gomez / Waterlow classifications.DEFINITION
Developmental red flags are warning signs indicating that a child's development is deviating significantly from normal and requires prompt evaluation. They may be positive (an abnormal sign present) or negative (an expected milestone absent). Recognising them allows early intervention when the developing brain is most plastic.
AGE-INDEPENDENT ('ANY-AGE') RED FLAGS
- Loss of previously acquired skills (regression) — always pathological.
- Persistent parental concern about development, vision or hearing.
- Asymmetry of movement or an early hand preference before 1 year (suggests hemiplegia).
- Abnormal tone — persistent hypertonia or hypotonia ('floppy infant').
- Abnormal / delayed disappearance of primitive reflexes.
AGE-SPECIFIC RED FLAGS
By age Warning sign 3 months No head control; not fixing/following; no social smile 6 months Persistent primitive reflexes; not reaching for objects; poor eye contact 9 months Not sitting with support; no babble 12 months Not sitting alone; no pincer grasp; no bisyllables; not bearing weight 18 months Not walking; no meaningful words; not pointing to show interest 2 years No 2-word phrases; unsteady gait; cannot follow simple commands 3 years Speech not understood by strangers; frequent falls; not interested in other children WHAT TO DO WHEN A RED FLAG IS FOUND
- Confirm with a structured screening tool (Denver II / TDSC) and calculate the DQ.
- Assess vision & hearing in every case (especially speech delay).
- Refer for a full developmental & neurological evaluation and early-intervention services.
⚠️DANGER / REMEMBER: Any regression, an absent parachute reflex after 10 months, not walking by 18 months, or no words by 18 months mandates urgent referral. Always correct for prematurity (up to 2 years) before labelling delay.🔑KEY POINTS TO REMEMBER- Red flags: regression, parental concern, asymmetry/early hand preference, abnormal tone.
- Not sitting by 9 mo, not walking by 18 mo, no words by 18 mo → refer.
- Absent parachute after 10 mo is abnormal.
- Correct for prematurity and check hearing/vision before labelling delay.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; NICE / IAP developmental surveillance guidance.DEFINITION
Adolescence (WHO: 10–19 years) is the transitional period between childhood and adulthood, marked by puberty (physical & sexual maturation), rapid physical growth, and profound psychosocial and cognitive change. Youth is 15–24 years and 'young people' 10–24 years.
ENDOCRINE BASIS
Reactivation of GnRH pulses (hypothalamus) → ↑ LH & FSH (pituitary) → ↑ Sex steroids (oestrogen / testosterone) → Secondary sexual characters + growth spurt
PHYSICAL CHANGES
- Girls (first sign: breast budding, ~8–13 yr): thelarche → pubarche → growth spurt → menarche (Tanner 4).
- Boys (first sign: testicular enlargement ≥ 4 mL, ~9–14 yr): genital growth → pubarche → growth spurt (later) → voice deepening, facial hair, nocturnal emissions.
- Growth spurt: peak height velocity earlier in girls (~11–12 yr) than boys (~13–14 yr); contributes ~15–20% of final adult height.
PSYCHOSOCIAL DEVELOPMENT (3 sub-stages)
- Early (10–13 yr): concern about body changes; concrete thinking.
- Middle (14–16 yr): peer influence peaks; risk-taking; identity formation.
- Late (17–19 yr): abstract thinking; future orientation; intimate relationships.
NUTRITIONAL NEEDS
- Peak nutritional demand of childhood — high requirements for energy, protein, iron, calcium and zinc.
- Girls need extra iron (menstrual loss) — hence weekly iron-folic-acid supplementation programmes.
COMMON ADOLESCENT HEALTH PROBLEMS
- Nutritional — iron-deficiency anaemia, obesity, eating disorders.
- Menstrual problems; acne; concerns about short stature / delayed puberty.
- Risk behaviours — substance use, unsafe sex / STIs, road-traffic injuries.
- Mental health — depression, anxiety, self-harm; academic and family stress.
💡CLINICAL PEARL: The HEEADSSS assessment (Home, Education/Employment, Eating, Activities, Drugs, Sexuality, Suicide/depression, Safety) is a structured psychosocial interview framework. India's RKSK programme addresses adolescent health.🔑KEY POINTS TO REMEMBER- Adolescence (WHO 10–19 yr); puberty via GnRH → LH/FSH → sex steroids.
- Growth spurt earlier in girls; menarche at Tanner 4.
- Common issues: anaemia, obesity, menstrual problems, risk behaviours, mental health.
- HEEADSSS framework; India's RKSK programme.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics; WHO / RKSK adolescent health.ANATOMY
The anterior fontanelle is the diamond-shaped membranous gap at the junction of the two frontal and two parietal bones (where the coronal and sagittal sutures meet). It is the largest of the six fontanelles and an important clinical 'window' in infancy.
NORMAL FACTS
- Size at birth ~2.5 cm (diagonal); normally flat and pulsatile.
- Normally closes by 9–18 months (the posterior fontanelle closes by 6–8 weeks).
- Allows moulding of the head during birth and accommodates rapid brain growth in infancy.
EXAMINATION TECHNIQUE
Palpate with the infant calm and held upright (crying or lying flat transiently makes it bulge). Assess tension, size and pulsation; a bulging non-pulsatile fontanelle is more concerning.
BULGING (TENSE) FONTANELLE
- Raised intracranial pressure — meningitis, encephalitis, intracranial haemorrhage, tumour.
- Hydrocephalus; benign intracranial hypertension; hypervitaminosis A; lead encephalopathy.
DEPRESSED (SUNKEN) FONTANELLE
- Dehydration (a key clinical sign in infantile diarrhoea).
- Severe undernutrition / wasting.
LARGE / DELAYED-CLOSING FONTANELLE
- Hypothyroidism, rickets, Down syndrome.
- Raised ICP / hydrocephalus; osteogenesis imperfecta; IUGR; prematurity; achondroplasia.
EARLY / SMALL CLOSURE
- Microcephaly, craniosynostosis, hyperthyroidism.
CLINICAL APPROACH
The fontanelle is examined as part of every infant assessment. Combine the finding with the head circumference, level of consciousness, and hydration status to localise the problem — e.g. a bulging fontanelle + fever + lethargy points to meningitis, whereas a sunken fontanelle + reduced skin turgor points to dehydration.
💡CLINICAL PEARL: A bulging fontanelle in a febrile, lethargic infant is meningitis until proven otherwise; a sunken fontanelle is a reliable sign of dehydration; a large, delayed-closing fontanelle with coarse features suggests hypothyroidism.🔑KEY POINTS TO REMEMBER- Anterior fontanelle: diamond, ~2.5 cm, closes 9–18 mo (posterior by 6–8 wk).
- Bulging = raised ICP/meningitis; sunken = dehydration.
- Large/delayed closure = hypothyroidism, rickets, Down syndrome.
- Examine with the infant calm and upright.
📚SOURCES: Ghai Essential Pediatrics; Nelson Textbook of Pediatrics.