title: Ultrastructural observation of Charcot-Leyden crystals in mechlorethamine-treated cutaneous lesions of histiocytosis X.
abstract: We were recently able to observe, by electron microscopy, Charcot-Leyden crystals in the cutaneous lesions of histiocytosis X (Letterer-Siwe disease) that had been treated by local applications of mechlorethamine. The occurrence of Charcot-Leyden crystals in skin lesions is infrequent; so far, these structures have been observed only in cases of facial (Lever's) eosinophilic granuloma and in incontinentia pigmenti. Although Charcot-Leyden crystals can at times be formed spontaneously in tissue lesions, the possibility that their formation was favored by the local action of mechlorethamine is considered.
mesh_terms: D003460:Crystallization; D006646:Histiocytosis, Langerhans-Cell / Q000188:drug therapy* / Q000473:pathology; D006801:Humans; D007223:Infant; D008297:Male; D008466:Mechlorethamine / Q000627:therapeutic use*; D008854:Microscopy, Electron; D012867:Skin / Q000648:ultrastructure*
chemical_list: D008466:Mechlorethamine