title: [Granulomatous skin disease after an exotic injury].
abstract: Piranhas are feared freshwater fishes commonly found in the waters of southern Venezuela to the north of Argentina. At present this species is a favourite domesticated article of our aquarists. The authors describe the histopathologic picture of a cutaneous lesion of the right hand thumb of a 60-year old piranha keeper who was bitten by this predatory fish. A firm node with increasing soreness gradually developed in the area of the lesion, and after 7 months the symptoms of the carpal tunnel syndrome were also present. Granulomatous foci--some sarcoid-like, others with central necrosis--were permeated with fibrinoid substance. Epithelioid granuloma cells with huge incorporated multinuclear elements were covered mainly by T-lymphocytes. Ziehl-Neelsen stain did not prove the presence of diagnostic acid-fast rods. Only in some macrophages rare acid-fast spheric microstructures were present in the cytoplasm. Both the local dermatologic finding and histological examination gave evidence that the skin was infected with atypical mycobacteria--swimming pool granuloma.
authors.affiliation: Ustav patologickej anatómie MFN a JLF UK, Martin. adamicova@jfmed.uniba.sk
authors.forename: K
authors.initials: K
authors.lastname: Adamicová
authors.forename: Z
authors.initials: Z
authors.lastname: Fetisovová
authors.forename: V
authors.initials: V
authors.lastname: Strmenová
authors.forename: Z
authors.initials: Z
authors.lastname: Maarouf
authors.forename: P
authors.initials: P
authors.lastname: Ondrejovic
authors.forename: R
authors.initials: R
authors.lastname: Mad'ar
authors.forename: Y
authors.initials: Y
authors.lastname: Mellová
mesh_terms: D000818:Animals; D001733:Bites and Stings / Q000150:complications* / Q000382:microbiology; D005399:Fishes; D006099:Granuloma / Q000209:etiology / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009165:Mycobacterium Infections, Nontuberculous / Q000209:etiology / Q000473:pathology*; D019910:Mycobacterium marinum; D017192:Skin Diseases, Bacterial / Q000209:etiology / Q000473:pathology*