Laparoscopic ovariectomy in 2 queens with uterine unicornis.

Two unrelated queens were presented for persistent signs of estrus despite a history of ovariohysterectomy. Uterine unicornis was suspected based on historical surgical findings. Anti-Müllerian hormone testing was consistent with the presence of ovarian tissue in both queens. Based on the ultrasonographic confirmation of unilateral abnormal structures in the ovarian region and ipsilateral absence of the kidney, a laparoscopic surgical approach was performed on each queen to remove remnant ovarian tissue. Laparoscopy confirmed the absence of a kidney ipsilateral to the remnant ovarian tissue. Both cats recovered from surgery and displayed no further signs of estrus. Key clinical message: To our knowledge, these are the first reported cases of feline uterine unicornis treated with a laparoscopic surgical approach. This minimally invasive approach, preceded by a thorough diagnostic work-up, may be of benefit to future queens with uterine unicornis. In addition, anti-Müllerian hormone testing has not been well-described in the literature when used in cats with remnant ovarian tissue. These cases may be of value to clinicians discovering the absence of a uterine horn when performing an ovariohysterectomy on queens. Copyright and/or publishing rights held by the Canadian Veterinary Medical Association.