Squamous Cell Carcinoma in a Capybara (Hydrochoerus            hydrochaeris)

Takahisa HAMANO; Fumio TERASAWA; Yoshiharu TACHIKAWA; Atsuko MURAI; Takashi MORI; Khaled EL-DAKHLY; Hiroki SAKAI; Tokuma YANAI

doi:10.1292/jvms.13-0395

Wildlife Science

Squamous Cell Carcinoma in a Capybara (Hydrochoerus hydrochaeris)

Takahisa HAMANO, Fumio TERASAWA, Yoshiharu TACHIKAWA, Atsuko MURAI, Takashi MORI, Khaled EL-DAKHLY, Hiroki SAKAI, Tokuma YANAI

Author information

Takahisa HAMANO
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
Fumio TERASAWA
Enoshima Aquarium, 2–19–1 Katase Kaigan, Fujisawa 251–0035, Japan
Yoshiharu TACHIKAWA
Gifu World Fresh Water Aquarium, 1453 Kawashima Kasada, Kakamigahara 501–6021, Japan
Atsuko MURAI
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
Takashi MORI
Laboratory of Veterinary Clinical Oncology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
Khaled EL-DAKHLY
Department of Veterinary Parasitology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
Hiroki SAKAI
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan
Tokuma YANAI
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan

Keywords: capybara, computed tomography, Hydrochoerus hydrochaeris, squamous cell carcinoma

JOURNAL FREE ACCESS

2014 Volume 76 Issue 9 Pages 1301-1304

DOI https://doi.org/10.1292/jvms.13-0395

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Abstract

A 4-year and 2-month-old male capybara (Hydrochoerus hydrochaeris) was diagnosed with squamous cell carcinoma on the buttocks after chronic recurrent dermatosis. The capybara was euthanized, examined by computed tomography and necropsied; the tumor was examined histologically. Computed tomography showed a dense soft tissue mass with indistinct borders at the buttocks. Histological examination of the tumor revealed islands of invasive squamous epithelial tumor cells with a severe desmoplastic reaction. Based on the pathological findings, the mass was diagnosed as a squamous cell carcinoma. This is the first study to report squamous cell carcinoma in a capybara.

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