title: Histiocytosis X.
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis; D006801:Humans; D008206:Lymphatic Diseases / Q000175:diagnosis*; D008297:Male; D009365:Neoplasm Regression, Spontaneous; D012878:Skin Neoplasms / Q000175:diagnosis