FEATURED CASE

BROWN SPOT ON THE LEFT SOLE

Male, 37 years old.
Personal history of multiple dysplastic nevi
Family history of Malignant Melanoma

Clinical: 2 mm irregularly shaped, light brown, macule.

Dermoscopy: Asymmetric brown macule with a parallel ridge pattern.

Confocal: At the level of stratum corneum, there are numerous bright linear structures that correspond to hyphae. A high power view shows numerous bright linear structures around sweat ducts.

Histology: Psoriasiform hyperplasia with hyphae in the stratum corneum (PAS positive). No melanocytic lesion was evident.

Diagnosis: Tinea pedis