title: Hairy-cell leukaemia presenting with pyoderma gangrenosum.
mesh_terms: D000368:Aged; D006801:Humans; D007370:Interferon Type I / Q000627:therapeutic use*; D007943:Leukemia, Hairy Cell / Q000150:complications* / Q000628:therapy; D008297:Male; D011711:Pyoderma / Q000209:etiology* / Q000628:therapy
chemical_list: D007370:Interferon Type I