Authors: K. Adamicová 1; Ž. Fetisovová 2; V. Strmeňová 3; Z. Maarouf 1; P. Ondrejovič 1; R. Maďar 4; Y. Mellová 5 Authors‘ workplace: Ústav patologickej anatómie MFN a JLF UK, Martin 2Dermatovenerologická klinika JLF UK a MFN, Martin 3Oddelenie plastickej chirurgie MFN, Martin 4Ústav epidemiológie JLF UK, Martin 5Ústav anatómie JLF UK, Martin 1 Published in: Čes.-slov. Patol., , 2003, No. 2, p. 80-84 Category:
Piranhas are feared freshwater fishes commonly found in the waters of southern Venezuela to thenorth 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 ofa 60-year old piranha keeper who was bitten by this predatory fish. A firm node with increasingsoreness gradually developed in the area of the lesion, and after 7 months the symptoms of thecarpal tunnel syndrome were also present. Granulomatous foci – some sarcoid-like, others withcentral necrosis – were permeated with fibrinoid substance. Epithelioid granuloma cells withhuge incorporated multinuclear elements were covered mainly by T-lymphocytes. Ziehl-Neelsenstain did not prove the presence of diagnostic acid-fast rods. Only in some macrophages rareacid-fast spheric microstructures were present in the cytoplasm. Both the local dermatologicfinding and histological examination gave evidence that the skin was infected with atypicalmycobacteria – swimming pool granuloma.
Key words: piranha injury – granulomatous inflammation – swimming pool granuloma – atypicalmycobacteriosis
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