A man with chronic recurrent ulcers at the axillac and groins.

Langerhans cell histiocytosis is an uncommon disease. There are various skin manifestations of this disorder. We report a 15 year-old patient with Langerhams cell histiocytosis, who first presented with polyuria, polydipsia and right elbow pain. A few years later, he developed chronic recurrent ulcers at his axillae and groins, simulating hidradenitis suppurativa. Histopathology and ultramicroscopic study showed Langerhans cells infiltrating the lesions. He also had fingernail changes without any evidence of fungal infection. Hidradenitis suppurative-like lesions with nail changes are rare manifestations of this disorder.