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Transcervical endoscope-guided emptying of a transmural uterine cyst in a mare
  1. B. P. B. Rambags, DVM1 and
  2. T. A. E. Stout, MA, VetMB, PhD, DipECAR, MRCVS1
  1. 1Section of Reproduction, Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 12, 3584 CM Utrecht, The Netherlands


An 18-year-old Friesian mare with a large intrauterine cyst was examined by transrectal ultrasonography. There were several small to moderately sized intraluminal endometrial cysts, one of which connected via the myometrium to a large subserosal cyst, thereby effectively forming a ‘transmural’ cyst complex. During a videohysteroscopy, the intraluminal part of this transmural cyst was removed by electrocoagulation via a polypectomy snare. It was then possible to drain the large subserosal part of the cyst into the uterine lumen by transrectal massage, thereby confirming the presence of the transmural connection.

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