This 17-year-old boy presented with eight months of a
hyperpigmented, scaly and somewhat reticulate eruption on the
chest, back and abdomen.
It was asymptomatic but was unsightly and appeared to be slowly
worsening. He was otherwise healthy.
The posterior neck and axillae were clear and the remainder of
his skin examination was normal. A scraping for fungus was
What is the most likely diagnosis?