INGUINAL MASTOCYTOSIS ASSOCIATED WITH HIS TIOCYTIC INFILTRATE

Introduction. The diagnosis of mastocytosis is usually not difficult i n cases with typical skin lesions. Intertrigo is exceptional. Case rep ort. An 83-year-old patient developed inguinal intertrigo bilaterally. The lesions contained maculopapulous elements without Darier's sign. The histology examination revealed a mixed mast cell infiltration pred ominated by histiocytes. The ultrastructure confirmed the diagnosis of cutaneous mastocytosis. No extension was observed. Discussion. Skin f olds are rarely involved in infiltrating diffuse mastocytosis. Two cas es have been reported in the literature including one doubtful case. M astocytosis should thus be included in the possible diagnoses in patie nts with macupopapulous intertrigo. In addition, the mastocytic and hi stiocytic polymorphism observed here is rare.