Dermatofibromas - Skin and soft tissue lumps

Dermatofibromas

Definition

A dermatofibroma is a cutaneous nodule containing macrophages or histiocytes.

Incidence

Common.

Age

Can occur at any age, more common in adults.

Sex

4F : 1M

Aetiology/pathophysiology

Historically dermatofibromas have been associated with trauma or insect bites, although the cause is unknown.

Clinical features

Lesions occur most commonly on the lower limbs. They are solitary firm elevated nodules with pigmentation of the overlying skin. Although classically asymptomatic they may cause itching or pain.

Management

Dermatofibromas are removed only if troublesome or if there is diagnostic uncertainty.