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Diseases of Aquatic Organisms

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DAO 156:47-52 (2023)  -  DOI:

Caudal peduncle mineralized lesion resembling calcinosis circumscripta in a wels catfish Silurus glanis

Samuele Zamparo1,#, Massimo Orioles2,#,*, Ginevra Brocca3,4, Justin Stilwell5, Marco Galeotti2, Ranieri Verin3

1Azienda Agricola Troticoltura Erede Rossi Silvio, Sefro, Macerata, 62030, Italy
2Department of Agricultural, Food, Environmental and Animal Sciences, Veterinary Pathology Unit, University of Udine, Udine, 33100, Italy
3Department of Comparative Biomedicine and Food Science, University of Padova, Legnaro, 35020, Italy
4Aquatic Diagnostic Services, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, PE C1A 4P3, Canada
5Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, USA
*Corresponding author:
#These authors contributed equally to this work

ABSTRACT: This report presents an intriguing case of a mineralized lesion resembling calcinosis circumscripta observed in the caudal peduncle of a wels catfish, housed in a public aquarium in northern Italy. The investigation encompasses a comprehensive analysis of various aspects, including clinical presentation, diagnostic imaging, as well as gross and microscopic pathology, and immunohistochemistry. Histopathology, in particular, highlighted a severe focally extensive granulomatous reaction, confirmed by dense histiocytic inflammatory infiltrates and the massive presence of multinucleated foreign body type giant cells localized around lakes and aggregates of mineralized material. Moreover, the usefulness and limitations of immunohistochemistry and special stains in characterizing fish tissues and cell types are highlighted. Although reported in elasmobranchs and sturgeons, to our knowledge, this is the first description of calcinosis circumscripta in teleost fish and it offers valuable insights into the understanding of similar pathologies in aquatic organisms.

KEY WORDS: Wels catfish · Silurus glanis · Calcinosis circumscripta · Immunohistochemistry · Histopathology

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Cite this article as: Zamparo S, Orioles M, Brocca G, Stilwell J, Galeotti M, Verin R (2023) Caudal peduncle mineralized lesion resembling calcinosis circumscripta in a wels catfish Silurus glanis. Dis Aquat Org 156:47-52.

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