title: Histiocytosis X in an adult mimicking pyoderma gangrenosum.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008875:Middle Aged; D011711:Pyoderma / Q000175:diagnosis*; D012883:Skin Ulcer / Q000175:diagnosis*