Spontaneous splenic hemangiosarcoma in pet guinea pigs (Cavia porcellus): five cases (2007–2021)

Paoletti, Carlo; Rosas-Navarro, José; Nicolier, Alexandra; Cusaro, Stefano; Guillon, Leslie; Ferreira, Xavier; Quinton, Jean-François

doi:10.1053/j.jepm.2022.12.004

Journal of Exotic Pet Medicine

2023

DOI: 10.1053/j.jepm.2022.12.004

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Spontaneous splenic hemangiosarcoma in pet guinea pigs (Cavia porcellus): five cases (2007–2021)

Carlo Paoletti

José Rosas-Navarro

Alexandra Nicolier³

et al.

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2024

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Cited by 2 publications

References 31 publications

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Free‐floating intraperitoneal necrotic lipoma in a guinea pig (Cavia porcellus)

Webb,

Herrman

2024

Vet Record Case Reports

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An approximately 3‐year‐old, male, neutered, black Dutch guinea pig (Cavia porcellus) was presented for routine health check shortly following adoption. Physical examination revealed an incidental non‐painful, firm, highly mobile, ovoid mass ventrally in the mid‐abdomen. The remaining examination was otherwise normal, and investigation was declined due to lack of clinical signs. The guinea pig was re‐presented 2 months later, as it appeared less interactive. The mass was unchanged, but mild abdominal pain was present on palpation. Ultrasound examination revealed a 60 × 40 mm discoid, hyperechoic mass with multiple hypoechoic, well‐demarcated cavitary areas. Exploratory laparotomy was performed and a free‐floating, dark tan, smooth, firm, biconvex mass was removed without further dissection or ligation. Clinical signs resolved in the first week, and the animal remained clinically normal 3 months postoperatively. A necrotic lipoma was confirmed on histology, and should therefore be a differential for an abdominal mass in this species.

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Free‐floating intraperitoneal necrotic lipoma in a guinea pig (Cavia porcellus)

Webb,

Herrman

2024

Vet Record Case Reports

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Neoplasia in pet guinea pigs: a retrospective analysis of 2,474 autopsy examinations

Bertram,

Donovan,

Bertram

et al. 2024

J VET Diagn Invest

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Neoplasia is a common disease in guinea pigs ( Cavia porcellus); however, few studies have evaluated the prevalence of neoplasia in all organ systems. We retrospectively analyzed the tumor prevalence in pet guinea pigs and the frequency of metastasis in a multi-institutional study population of 2,474 autopsy cases. Tumors were found in 508 guinea pigs (prevalence: 20.5%), of which 95 cases had >1 tumor, resulting in a total of 627 tumors. The tumor prevalence increased from 1.4% in animals <0.5-y-old to 53.6% for guinea pigs >5-y-old. The most common tumor type was lymphoma or leukemia, affecting 174 guinea pigs (tumor prevalence: 7.0%). Lymphomas or leukemias were disseminated to various organs and/or lymph nodes in 146 (83.9%) cases and localized to 1 organ or 1 lymph node in 28 (16.1%) cases. Primary non-lymphoid tumors were most frequent in the female genital tract (62 of 1,235 cases, mostly uterus), respiratory system (116 of 2,474), skin including mammary gland (81 of 2,474), endocrine system (66 of 2,474, mostly thyroid gland), and alimentary tract (35 of 2,474). Tumors of the alimentary tract were dominated by gastrointestinal stromal tumors. Metastasis was detected in 42 of 453 non-lymphoid tumors (9.3%), with a surprisingly low frequency for pulmonary carcinoma and splenic hemangiosarcoma compared to other species. Our postmortem study demonstrates a high prevalence of disseminated lymphoma or leukemia in pet guinea pigs at the time of death or euthanasia. Additional studies are needed to further characterize these tumors.

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Spontaneous splenic hemangiosarcoma in pet guinea pigs (Cavia porcellus): five cases (2007–2021)

Cited by 2 publications

References 31 publications

Free‐floating intraperitoneal necrotic lipoma in a guinea pig (Cavia porcellus)

Free‐floating intraperitoneal necrotic lipoma in a guinea pig (Cavia porcellus)

Neoplasia in pet guinea pigs: a retrospective analysis of 2,474 autopsy examinations

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