he lipid-rich carcinoma (LRC) is an atypical canine malignant mammary gland neoplasm belonging to the special carcinomas. This report aims to describe the macroscopic and microscopic lesions of a mammary lipid-rich carcinoma in a dog. On the post mortem examination, multiple bilateral nodules firm in consistency were found in the thoracic and abdominal mammary glands. Pulmonary metastases were observed. At histopathology, the nodules were formed by cells arranged in solid nests with extensively vacuolized cytoplasm. The anatomopathological changes described are compatible with a canine mammary metastatic lipid-rich carcinoma.

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