Write a short note on Trophic Ulcer.

Definition

A trophic (neuropathic) ulcer is a painless ulcer that develops over a pressure point in an area that has lost its protective sensation. Because the part is insensitive, repeated unperceived pressure and minor trauma break down the skin and the ulcer fails to heal. It is a marker of an underlying neuropathy.

Causes & Sites

Any cause of sensory neuropathy: diabetes mellitus (the commonest today), leprosy, tabes dorsalis, spinal cord injury/spina bifida, and peripheral neuropathies. Ulcers form over weight-bearing/pressure points — classically under the metatarsal heads and the heel of the foot — and are typically deep, punched-out and painless, often with surrounding callus.

Management

Management combines treating the underlying cause (glycaemic control, multi-drug therapy for leprosy) with meticulous local and pressure care: offloading the pressure point (total-contact cast, special footwear, orthoses), debridement and wound care, treating infection, and patient education in daily inspection and protection of insensate parts. Prevention — protective footwear and foot care — is far better than cure.

Clinical Note

The trophic ulcer is fundamentally a warning sign of an insensate limb at risk, and in practice the battle is won by prevention: education of the patient to inspect and protect the feet daily, provision of properly fitting protective footwear and offloading, and prompt treatment of any early breakdown, all coordinated with control of the underlying diabetes or leprosy, prevent the descent into deep infection, osteomyelitis and amputation.

Painlessness over a pressure point is the defining feature.

• Painless ulcer over a pressure point in an area lacking protective sensation.
• Causes: diabetes (commonest), leprosy, tabes, spinal cord injury/spina bifida.
• Deep, punched-out, painless; classically under metatarsal heads.
• Treat the neuropathy + offload, debride, prevent (footwear, inspection); avoid amputation.