title: Pseudotumor resulting from atypical mycobacterial infection: a "histoid" variety of Mycobacterium avium-intracellulare complex infection.
abstract: A 54-year-old immunosuppressed cardiac transplant recipient with a six-month history of progressive swelling of the hand, with nodules and linear lymph node chain enlargement, diagnosed as a sporotrichoid Mycobacterium avium-intracellulare pseudotumor is described. The microscopic features closely resembled the previously described histoid variety of lepromatous leprosy. Routine hematoxylin and eosin staining suggested a spindle cell neoplasm rather than an infectious or inflammatory process. An infectious etiology was pursued on the basis of the clinical setting.
authors.forename: C
authors.initials: C
authors.lastname: Wood
authors.forename: B J
authors.initials: BJ
authors.lastname: Nickoloff
authors.forename: N R
authors.initials: NR
authors.lastname: Todes-Taylor
mesh_terms: D003937:Diagnosis, Differential; D005350:Fibroma / Q000473:pathology; D005354:Fibrosarcoma / Q000473:pathology; D006801:Humans; D007889:Leiomyoma / Q000473:pathology; D008297:Male; D008545:Melanoma / Q000473:pathology; D008875:Middle Aged; D009164:Mycobacterium Infections / Q000473:pathology*; D009165:Mycobacterium Infections, Nontuberculous / Q000150:complications / Q000473:pathology*; D009380:Neoplasms, Nerve Tissue / Q000473:pathology; D012878:Skin Neoplasms / Q000209:etiology / Q000473:pathology*