Which of the following is NOT a predisposing factor for interdigital fibroma?

• A. Interdigital dermatitis
• B. Foot rot
• C. Foreign body
• D. Poor nutrition

Answer: (D)

Interdigital fibroma forms as a fibrous growth in the skin between toes when there is ongoing irritation and inflammation in that area. Anything that keeps that interdigital skin irritated or traumatized tends to promote such a fibrous overgrowth. Interdigital dermatitis and foot rot both create chronic inflammation and moisture, predisposing to fibroma development. A foreign body continually irritates the skin, producing a similar inflammatory stimulus that can lead to fibrous tissue proliferation.

Poor nutrition, while it can influence overall health and healing capacity, does not directly drive the localized fibrous response seen in interdigital fibroma. It’s more about the specific local irritation rather than systemic nutritional status. Therefore, poor nutrition is not considered a predisposing factor.