Not Just Uterine Adenocarcinoma—Neoplastic and Non-Neoplastic Masses in Domestic Pet Rabbits (Oryctolagus cuniculus): A Review
2021
Baum, Berit
With increasing numbers of pet rabbits living out their natural lifespan, rabbit oncology is stepping more and more into the limelight. On the other hand, rabbit tumors are less covered in recent editions of textbooks of veterinary pathology than before. We present 1238 cases with neoplastic and non-neoplastic masses in rabbit tissue, submitted from 2008 to 2019, supplemented by a review of the literature on neoplasms in rabbits. Cutaneous masses comprised 47% of submissions. Trichoblastoma was by far the most common skin neoplasm, and nodular suppurative panniculitis was the second most frequent skin nodule in this series. Epithelial as well as mesenchymal cutaneous neoplasms can be virally induced in rabbits (eg, Shope papilloma, myxomatosis) but were infrequent in the current cases. Mammary neoplasms comprised 21% of submitted masses and 94% of these had histologic features of malignancy. Tumors of the female reproductive tract were responsible for 9% of biopsies and were predominantly uterine adenocarcinoma. Polypoid proliferation of rectal mucosa was the most common lesion in the alimentary tract. A broad spectrum of other neoplasms was described, including sarcomas at vaccination sites and ocular posttraumatic sarcomas, comparable to lesions described in cats.
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