Letter: Umbilical basal cell carcinoma in a 21-year-old man: Report of an exceptional case and dermatoscopic evaluation.

We report an exceptional case of umbilical basal cell carcinoma (BCC) in a 21-year-old man, whose correct diagnosis was suggested by dermoscopy during initial complete body mole mapping. Although BCC is a common skin tumor, only 7 cases of BCC arising within the umbilicus have been reported previously. To the best of our knowledge, our patient is unique because of his age, being the youngest case of umbilical BCC described in the literature. Complete examination and digital dermoscopic monitoring let us identify an asymptomatic, nonpigmented papule at the umbilicus. Dermoscopy images revealed signs of superficial ulceration and several types of vascular structures, which gave us the clue for the diagnosis and helped us differentiate it from other lesions such as Spitz nevus or amelanotic melanoma. The diagnosis was confirmed with histopathology after excision and there was no evidence of relapse in the following four years.