Dermatofibroma

Dermatofibroma (Fibrous Histiocytoma)

Overview

Dermatofibromas are common, benign firm nodules that occur in the skin, most often on the legs. They are thought to develop as a reaction to minor trauma such as insect bites or small injuries. They are harmless and typically do not require treatment.

Key Symptoms

• Firm, round, slightly raised nodule in the skin
• Usually brown, pink, tan, or reddish-brown in color
• Typically 5-10 mm in diameter
• Dimples inward when pinched from the sides (dimple sign)
• May be mildly tender or itchy
• Usually develops slowly and remains stable over time

Affected Areas

Legs (most common), Arms, Trunk

Care Instructions

1. No treatment is usually necessary since dermatofibromas are benign.
2. Avoid trauma to the area to minimize irritation.
3. See a dermatologist if the nodule grows rapidly, changes color, or becomes painful.
4. Surgical excision can be performed if the lesion is bothersome.
5. A biopsy may be recommended if the clinical appearance is atypical.

Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice. Always consult a qualified dermatologist for diagnosis and treatment.

Prevalence: Common; more frequently seen in women than men