Dermatofibroma. These are benign dermal nodules that represent a focal
proliferation of fibroblasts; the overlying epidermis is slightly thickened.
Their occurrence is not unusual in children and adolescents. Dermatofibromas
are firm and may be black, red, brown, or flesh-colored. Their diameter
generally ranges from 0.5 to l.5 cm, although they may occasionally be larger.
Dermatofibromas may be solitary or multiple, and they develop either
spontaneously or after minor trauma to the skin, such as an insect bite. Most
are asymptomatic but sometimes may be painful on palpation. A very useful
diagnostic maneuver is executed by exerting lateral pressure on the lesion. The
skin overlying a dermatofibroma will frequently dimple. Dermatofibromas require
surgical treatment only when they are of cosmetic concern to the patient.
However, biopsy analysis is occasionally required in order to confirm the
diagnosis and to differentiate it from more serious disorders.
Color Atlas of Pediatric
Samuel Weinberg, Neil S. Prose, Leonard Kristal
Copyright 2008, 1998, 1990, 1975, by the McGraw-Hill Companies, Inc. All rights