A Solitary Firm Nodule Over Back.

This article discusses a case of an adolescent male who presented with a solitary firm nodule on his upper back. The nodule was asymptomatic and had been present for four years. Despite receiving multiple treatments, the nodule did not improve. Dermoscopy and histopathology revealed features consistent with aneurysmal dermatofibroma (ADF), a rare variant of dermatofibroma. ADF can be mistaken for other malignancies and requires a high degree of suspicion for diagnosis. The nodule was surgically excised without recurrence. [Extracted from the article]