Published online Aug 2, 2012. doi: 10.5314/wjd.v1.i2.10
Revised: June 20, 2012
Accepted: July 26, 2012
Published online: August 2, 2012
Hidroacanthoma simplex (HAS) is a rare skin appendage tumor and is recognized as an intraepidermal variant of poroma. Pigmented HAS is an extremely rare variant with dendritic melanocytes and/or melanin pigment in the tumor cells and a few cases of pigmented HAS have been reported in the English literature. We herein report a case of pigmented HAS and discuss the clinicopathological features of pigmented HAS and the pitfall in the diagnosis of black lesions.