Cytology of a seminoma in a koi carp (Cyprinus carpio): a rapid diagnostic tool

Author:

Pigoli Claudio1,Ghisleni Gabriele2,Armando Federico3,Grieco Valeria4,Ghidelli Andrea5,Brambilla Eleonora1,Brambilla Eleonora1

Affiliation:

1. Sede Territoriale di Milano, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia-Romagna (IZSLER)

2. BiEsseA Laboratorio analisi veterinarie, an Antech Company

3. University of Veterinary Medicine

4. University of Milan

5. Clinica Veterinaria Sant'Emiliano

Abstract

Abstract Koi carp (Cyprinus carpio) is an ornamental variety of common carp frequently kept as pets. Since their long lifespan, neoplasia, albeit rare, may occur in these animals, and only a few studies have faced their cytological diagnosis. In the present case, a koi carp was referred to the clinicians due to coelomic swelling. The carp underwent surgery, which revealed an enlargement of both removed testes. Testicular samples were cytologically and histologically examined. The lesion was diagnosed as a seminoma since it was composed of round, large, atypical, and often multinucleated cells with round central nuclei and moderate cytoplasm. These tumors had the same appearance as seminomas in mammals and should be considered among differential diagnoses when coelomic swelling occurs in koi carp. Seminomas in koi carp are diagnosed histologically, but cytology, a rapid and cheap exam executable in all veterinary clinical facilities, could be a relevant preliminary diagnostic tool that may influence the entire diagnostic process.

Publisher

Research Square Platform LLC

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