Uterine tumours are rarely reported in cats. This case report describes two older queens with typical presentations consistent with pyometra. However, histopathology of the uteri diagnosed each case with concurrent uterine neoplasia (endometrial adenocarcinoma and poorly differentiated sarcoma). One cat survived long-term, while the other was suspected to have advanced metastatic disease and pulmonary metastasis on postoperative radiographs after developing respiratory distress. Diagnostic tests, including thoracic radiographs and abdominal ultrasound, should be considered when evaluating middle-aged to older queens suspected of pyometra to screen for evidence of neoplasia and to assess the extent of disease. Histopathological analysis of excised uterine tissue should be recommended to assess for uterine neoplasia in all cats with presumptive pyometra.
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Contributors All authors contributed significantly to the writing and editing of the draft of this article.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data availability statement All data relevant to the study are included in the article.
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