Which are predisposing factors to interdigital fibroma?

• A. Interdigital dermatitis, foot rot, foreign body
• B. Only wet conditions
• C. None
• D. High protein diet

Answer: (A)

Interdigital fibroma arises from chronic irritation and inflammation in the interdigital skin, leading to fibrous tissue overgrowth. Conditions that keep the interdigital area irritated over time are the main predisposing factors. Interdigital dermatitis causes ongoing skin irritation and inflammation, setting up the tissue for fibrous proliferation. Foot rot introduces infectious inflammation in the interdigital spaces, increasing irritation and the tissue’s reactive response. A foreign body lodged in the gap can cause persistent mechanical irritation, driving fibroma development. Wet conditions aren’t a specific predisposing factor by themselves, and a high protein diet isn’t related to this condition. So the combination of interdigital dermatitis, foot rot, and a foreign body best predisposes to interdigital fibroma.