Keratosis lichenoides chronica: a diagnostic and therapeutic challenge.

Summary A 45-year-old man presented with a 7-year history of keratosis lichenoides chronica (KLC), a mucocutaneous lichenoid disorder of keratinization with no known aetiology, without significant systemic associations. Our patient also had type I diabetes mellitus, mild hypertension and lipid abnormalities. The diagnosis and treatment of KLC is often challenging.