Luteoma in two mares treated by ovariectomy |
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| Authors: | E Combs T Beachler J R Troy A Olds-Sanchez J M Howard A Fales-Williams M Yaeger D M Tatarniuk |
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| Institution: | 1. Department of Veterinary Clinical Sciences, Iowa State University, Ames, Iowa, USA;2. Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, Iowa, USA;3. Aspen Creek Veterinary Hospital, Conifer, Colorado, USA;4. Department of Veterinary Pathology, Iowa State University, Ames, Iowa, USA |
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| Abstract: | A 15-year-old Paint mare (Case 1) and a 15-year-old Arabian mare (Case 2) were presented for aggressive and undesired behaviour. Reproductive evaluation revealed, initially, an enlarged ovary with a smaller/normal sized contralateral ovary in each case. Granulosa cell tumour (GCT) panel testing revealed elevated inhibin B in both cases and elevated anti-Mullerian hormone (AMH) levels only in Case 1 determined from currently established reference ranges. Based on a presumptive diagnosis of GCT, bilateral standing ovariectomy was elected for both mares. In each case neoplastic tissue consistent with luteoma was detected only on histological examination in the smaller/normal sized left ovary; the right ovary appearing normal. Long-term follow-up was performed 1 year and 5 years post-operatively by telephone. The owners were satisfied with the outcome and each patient demonstrated resolution of aggressive stallion-like behaviour. Each case returned to the owners' intended use. In conclusion, luteoma should be considered as a differential diagnosis for ovarian neoplasms in horses related to behavioural abnormalities, even in normal-sized ovaries. |
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| Keywords: | horse luteoma ovarian neoplasm ovariectomy |
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