Monocytic sarcoma is a neoplasm of immature monocytes involving any extramedullary site such as skin. The definite diagnosis is important for adequate therapy, which is often delayed becauseof misdiagnosis. We report a 51-Year-old diabetic woman who presented with several erythematous itchy papules and plaques on her s...

An 80-year-old man visited our department with asymptomatic skin lesions that had appeared 2 months earlier. The patient stated that he was not receiving any regular treatments and had not been administered new drugs; he reported no fever or other symptoms and did not recall having been bitten or stung. Physical examination revealed erythematous papules on the upper part of the torso; the papul...

An 80-year-old man visited our department with asymptomatic skin lesions that had appeared 2 months earlier. The patient stated that he was not receiving any regular treatments and had not been administered new drugs; he reported no fever or other symptoms and did not recall having been bitten or stung. Physical examination revealed erythematous papules on the upper part of the torso; the papul...

A 13-year-old girl developed a non-pruritic pityriasis rosea-like rash, which did not respond to topical corticosteroids or UV therapy but persisted for 2 years. The lymphohistiocytic infiltrate in the upper dermis showed mononuclear cells immunoreactive with S100, CD68, factor XIIIa and CD1a. Electron microscopic evaluation of these cells demonstrated lamellated dense bodies but no Birbeck gra...