Rodent Oncology

Hocker, Samuel E; Eshar, David; Wouda, Raelene M.

doi:10.1016/j.cvex.2016.07.006

Cited by 25 publications

(13 citation statements)

References 98 publications

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“…Considering that GL cell levels in the dermis and subcutaneous tissue is dependent on circulating androgen levels, most atypical fibromas are detected in sexually mature male hamsters older than 7-months (Hocker et al 2017), while most of the cases of the present work occurred in females. Additionally, the cases herein were differentiated through the neoplastic cells' histological features, as these were predominantly spindle.…”

Section: Discussionmentioning

confidence: 65%

“…In contrast, older animals usually develop immune resistance to lymphoma development (Coggin et al 1983). Additionally, lymphoma induced by HaPV infection mostly occurs in research colonies (Hocker et al 2017), but rarely in pet hamsters (Simmons et al 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Fibrosarcomas often have an infiltrative and recurrent behavior, but metastases are rare in domestic animals (Hendrick 2017), similarly to the present study wherein single nodules restricted to the skin were observed. These lesions involved mainly the limbs and ventrum (mammary gland), which are referred as the most common locations for fibroma or fibrosarcoma development in hamsters (Kondo et al 2011, Hocker et al 2017. Differential diagnosis of fibrosarcoma in hamsters should include atypical fibroma/fibrosarcoma, a neoplasm derived from ganglion cell-like (GL) cells characterized by large amounts of GL cells, which are similar to histiocytes or neurons and intermixed with collagen fibers (Baba et al 2003).…”

Section: Discussionmentioning

confidence: 99%

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Neoplasms in domestic hamsters in Southern Brazil: epidemiological and pathological aspects of 40 cases1

et al. 2020

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Although neoplasms are commonly reported in domestic hamsters, retrospective studies approaching spontaneous tumors with data regarding epidemiological findings are scarce. The present study aimed to describe the epidemiological and pathological findings of 40 cases of tumors in domestic hamsters diagnosed in a veterinary pathology laboratory in Southern Brazil from 2002 to 2019. Chinese hamster (Cricetulus griseus) was the most commonly affected species (16/40), followed by Djungarian hamster (Phodopus sungorus, 11/40) and Syrian hamster (Mesocricetus auratus, 4/40). Among the cases, 57.5% were females (23/40), while 42.5% were males (17/40). The affected hamsters’ median age was of 14-months old, with an age range of 8- to 36-months old. Twenty-four cases were assessed as anatomopathological samples (biopsies), while 16 were composed of carcasses submitted to postmortem examination, and, therefore, the neoplasm was related to the cause of death. The integumentary system was frequently affected (60%, 24/40), followed by the female reproductive tract (22.5%, 9/40), hematopoietic system (10%, 4/40), digestive tract (5%, 2/40), and endocrine system (2.5%, 1/40). The most frequent neoplasm was squamous cell carcinoma (35%, 14/40), mostly on the lip/nasal region (50%, 7/14). Other tumors included fibrosarcoma (10%, 4/40), lymphoma (10%, 4/40), mammary cystadenoma (10%, 4/40), apocrine sweat gland adenoma (7.5%, 3/40), hemangiosarcoma (5%, 2/40), leiomyosarcoma (5%, 2/40), and granulosa ovarian cell tumor (5%, 2/40). The five remaining cases occurred individually and were composed of hepatoid gland adenoma, solid thyroid carcinoma, cutaneous melanoma, ovarian teratoma, and cutaneous trichoblastoma. Neoplasms were identified as an important cause of death and major reason to perform biopsy in domestic hamsters in Southern Brazil.

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Neoplasms in domestic hamsters in Southern Brazil: epidemiological and pathological aspects of 40 cases1

et al. 2020

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“…Mammary tumors can occur in male rats but at a lower incidence. 19 Surgical removal is recommended but other neoplasia may occur in the remaining mammary tissue. The incidence of mammary tumors, in addition to pituitary tumors, can be reduced in rats that are ovariectomized at 90 days of age compared with those that were not ovariectomized.…”

Section: Ratsmentioning

confidence: 99%

Selected Veterinary Concerns of Geriatric Rats, Mice, Hamsters, and Gerbils

Dutton¹

2020

Veterinary Clinics of North America: Exotic Animal Practice

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“…Neoplasms occur in guinea pigs, especially those older than 3 years; but reports are rare and therefore the impression given by a single report may belie real incidences in the long run (11). Among the most described neoplasms in guinea pigs are skin tumors (trichofolliculomas; lipomas), mammary gland tumors (adenomas and adenocarcinomas), tumors of the reproductive system (uterine leiomyomas), tumors of the endocrine system (thyroid carcinomas), tumors of the respiratory system (bronchogenic papillary adenoma), and tumors of the hematopoietic system (lymphoma; leukemia) (11,13). (20).…”

Section: Introductionmentioning

confidence: 99%

Fibroblastic osteosarcoma in a guinea pig (Cavia porcellus)

Vetter¹,

Maidana²,

Gonzalez-Vatteone³

et al. 2023

BJVP

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The article describes the case of a 3 year 6 months old Guinea Pig (Cavia porcellus) that was assisted at the Wildlife and Exotic Animal Practice of the Faculty of Veterinary Sciences, National University of Asunción. The patient presented a hard mass in the right hind limb extending from the proximal portion of the femur, projecting caudally to the proximal tuberosity of the calcaneus, with an increase in temperature, and a marked increase in sensitivity. Radiographic diagnosis refers to a mass with amorphous areas of mineral density. Fine needle aspiration puncture revealed an undifferentiated malignant proliferative process, requiring histopathological analysis to characterize the process. Disarticulation was performed and subsequent histopathologic diagnosis under hematoxylin-eosin and Masson’s trichrome stain revealed fibroblastic osteosarcoma.

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Rodent Oncology

Cited by 25 publications

References 98 publications

Neoplasms in domestic hamsters in Southern Brazil: epidemiological and pathological aspects of 40 cases1

Neoplasms in domestic hamsters in Southern Brazil: epidemiological and pathological aspects of 40 cases1

Selected Veterinary Concerns of Geriatric Rats, Mice, Hamsters, and Gerbils

Fibroblastic osteosarcoma in a guinea pig (Cavia porcellus)

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