Reticulated porokeratosis. A unique variant of porokeratosis

A young man presented with a chronic, persistent reticulated dermatosis involving the groin, genitals, and thighs that was refractory to therapy. Biopsy specimen revealed multiple cornoid lamellae consistent with porokeratosis. This clinical appearance has not been previously described, to our knowledge. The other clinical forms of porokeratosis and their histology are briefly reviewed.