Excisional biopsy followed by histopathological examination is frequently the appropriate procedure. No melanocytic lesions should be removed or destroyed without histopathological confirmation of its benignancy. In any case, when the diagnosis of benign melanocytic nevus is in doubt, surgical excision is the procedure of choice. Dermatofibroma Dermatofibromas are relatively common nodules which may appear on any part of the body surface, but most commonly on the legs. They are dark brown, red, or yellowish nodules which are fixed to the skin surface and freely moveable over the subcutaneous tissue.
Lateral compression produces the characteristic dimple sign.
The etiology has been assumed to be traumatic. These lesions may regress leaving an area of hypopigmentation. No treatment is necessary. Here is a firm nodule, found on the leg of an otherwise well adult. Biopsy demonstrated swirls of thin collagen consistent with dermatofibroma.