Endoscopic Laser Ablation of a Midline Cyst of the Colliculus Seminalis as a Treatment for Anejaculation in a Stallion |
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| Affiliation: | 1. Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, FL;2. Department of Veterinary Science, Animal Reproduction and Welfare, University of Agriculture, 30-059 Krakow, Poland;1. Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, University of Gent, Merelbeke, Belgium;2. Anaesthesiology and Intensive Care Unit, Companion Animal Clinic, Department of Clinical Sciences, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece;1. Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA;2. Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, 95616, United States;3. Department of Animal Science, University of California, Davis, CA, 95616, USA;4. Research Triangle Institute, 3040 Cornwallis Road, Research Triangle Park, NC, 27709, USA;1. Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana Champaign, Urbana, IL, USA;2. Departamento de Clinica e Cirurgia Veterinaria, Universidade Federal do Piaui, Teresina, Piaui, Brazil;3. Departamento de Clinica Veterinaria, Faculdade de Veterinaria, Universidade Federal de Pelotas, Rio Grande do Sul, Brazil;4. Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Texas A & M University, College Station, TX 77843, USA;1. Comparative Theriogenology, Department of Veterinary Clinical Science, College of Veterinary Medicine, Center for Reproductive Biology, Washington State University, Pullman, WA;2. Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX |
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| Abstract: | An 18-year-old Appaloosa stallion presented with a history of ejaculatory dysfunction, which had recently progressed to an inability to ejaculate (anejaculation). Transrectal ultrasound evaluation revealed the presence of a prominent midline cyst of the colliculus seminalis, which was compressing the most terminal parts of the deferent ducts. Both ducts were enlarged and filled with hyperechoic content. The stallion was diagnosed with a complete occlusion of the deferent ducts because of the compression from the midline cyst of the colliculus seminalis. To date, there are no established treatments for this condition in stallions, although several procedures have been successfully used in men affected by similar problems. Therefore, we proposed performing one of these procedures—a laser ablation of the cyst to collapse it and to open the ejaculatory path. The stallion was placed under general anesthesia, and an endoscopic ultrasound-guided laser ablation of the cyst was performed. No immediate or long-term complications were observed. After the expulsion of accumulated material, the stallion produced normal semen and successfully impregnated mares during the next breeding season. |
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| Keywords: | Stallion Anejaculation Cyst Colliculus seminalis Laser Ablation |
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