Résumé
Xanthoma disseminatum is a rare, benign, normolipemic form of non-Langerhans cell histiocytosis affecting the skin and mucous membranes. The cutaneous manifestations consist of hundreds of papules that are red – brown at first and then become yellowish. The papules symmetrically involve the eyelids, trunk, face and proximal extremities and in flexures and folds, tend quickly to merge, forming soft plaques. It is frequently associated with diabetes insipidus. Biopsy specimens show a mixture of histiocytes, foam cells, and inflammatory cells. Later, foam cells predominate and Touton giant cells are frequently present. This chronic disease has no known established treatment.
Résumé
Mycosis fungoides (MF) is the most common group of cutaneous T-cell lymphomas. It is a rare non-Hodgkin’s lymphoma of mature, skin-homing, clonal, malignant T lymphocytes, usually observed in mid to late adulthood, that initially presents in the skin as patches, plaques, tumors, or generalized erythema (erythroderma) and can involve the lymph nodes and peripheral blood. In this review, we survey the MF literature of the last decade and highlight the major trends.