• Journal of Veterinary Clinics
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• v.39 no.3
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• pp.126-130
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• 2022

A 17-month-old intact male Djungarian hamster (Phodopus sungorus) was presented with an axillary mass. Fine needle aspiration cytology of the mass showed a malignant epithelial cell tumor. Histopathological examination of the surgically removed mass confirmed a complex apocrine gland adenocarcinoma. Twenty days postoperatively, the mass recurred in the same area, and the patient died while waiting for the second surgical removal. This is the first report of the cytology, histopathology, and postoperative recurrence of apocrine gland adenocarcinoma in a Djungarian hamster.

• Journal of Veterinary Clinics
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• v.41 no.1
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• pp.65-70
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• 2024

Ten cutaneous masses from Djungarina hamsters (Phodopus sungorus) were diagnosed as nine atypical fibromas and one fibrosarcoma derived from cutaneous ganglion cell-like cells. Among these patients, nine were male and one was female. Histologically, these abnormal masses were composed of spindle-shaped or polygonal neoplastic 'ganglion cell-like' cells with abundant amphophilic vacuolated cytoplasm. Immunohistochemically, these neoplastic cells were stained for vimentin, S100, and neuron-specific enolase. Out of 9 males, 3 showed positive reactions to the androgen receptor. This report provides a detailed histologic and immunohistochemical characterization of atypical fibroma, fibrosarcoma, and the tumorigenesis of ganglion cell-like cells in Djungarian hamsters.