SURGICAL MANAGEMENT OF UTERINE LESIONS IN TWO CAPTIVE ORANGUTANS (PONGOSPP.)

Abstract

Uterine lesions in two orangutans were effectively managed with surgical intervention. A 26-year-old hybrid orangutan ( Pongo spp.) was diagnosed with uterine adenomyosis based on advanced imaging. Histologic evaluation identified multifocal myometrial endometriosis, a variant of adenomyosis. A 27-year-old Bornean orangutan ( Pongo pygmaeus) was diagnosed with a focal uterine fibroid based on histologic examination. The animals were housed at separate institutions and initially presented with dysmenorrhea and menorrhagia. Both animals were treated intermittently for episodes of dysmenorrhea, with recurrence of clinical signs after each treatment. Due to the lack of consistent response to medical management, an ovariohysterectomy in the hybrid orangutan and a myomectomy in the Bornean orangutan were performed and resulted in complete resolution of clinical signs. Surgical management of adenomyosis and neoplasia has previously been reported in nonhuman primates. These cases are the first known documentation of surgical management of multifocal myometrial endometriosis and a fibroid in orangutans.

Use of Hysteroscopic Morcellation With a Myosure® Device for Removal of Uterine Foreign Material in an Orangutan (Pongo Sp.)

“…In this orangutan, abdominal surgery was considered high risk because of the likely presence of adhesions associated with the previous abdominal exploratory surgery; therefore, noninvasive removal of the uterine foreign material was highly preferred. 6 Although the wooden foreign material was visible on both ultrasound and CT, it was easier to identify with ultrasound, consistent with previous reports. 10 Hysteroscopy, however, was the best imaging modality for clear visualization of the uterine foreign material.…”

Surgical management of dystocia in a colobus monkey (Colobus guereza)

“…1 In cases of dystocia or significant reproductive pathology, a permanent form of sterilization like ovariohysterectomy (OVH) may be indicated. 2,3 Anatomical differences when compared with other species require adjustment to surgical procedures. This report describes a hysterotomy due to large fetal size and malposition, and provides a detailed description of OVH in a black and white colobus monkey (Colobus guereza).…”

“…Reproductive control of non‐human primates is often achieved by oral contraception or planned breeding 1 . In cases of dystocia or significant reproductive pathology, a permanent form of sterilization like ovariohysterectomy (OVH) may be indicated 2,3 . Anatomical differences when compared with other species require adjustment to surgical procedures.…”