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Endoscopic Laser Ablation of a Midline Cyst of the Colliculus Seminalis as a Treatment for Anejaculation in a Stallion.
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.
Copyright © 2020 Elsevier Inc. All rights reserved.
Publication Date: 2019-12-23 PubMed ID: 32067666DOI: 10.1016/j.jevs.2019.102896Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
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- Journal Article
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The study reports on the successful use of endoscopic laser ablation in treating an adult Appaloosa stallion with ejaculatory dysfunction due to a blocked ejaculatory pathway by a cyst. No complications were observed following the procedure and the stallion resumed normal semen production and successfully impregnated mares.
Background of the Study
- The research was conducted on an 18-year-old Appaloosa stallion, which was having problems in ejaculation.
- The stallion’s condition had gradually worsened to anejaculation, a state of inability to ejaculate.
- Upon transrectal ultrasounds, a prominent midline cyst was found in the colliculus seminalis (a structure near male horse’s prostate gland) which was compressing the deferent ducts, the passages that transport sperm.
- This compression caused the deferent ducts to enlarge and fill up with hyperechoic content, resembling an occlusion or blockage.
Aim of the Research
- Currently, there isn’t any established treatment for this condition in stallions.
- In humans, however, several operative procedures have been used successfully for similar situations.
- In light of this, the researchers proposed to adopt one such method – laser ablation – for this case. The aim was to collapse the cyst and reopen the ejaculatory path.
Proceedings and Findings of the Study
- The stallion was put under general anesthesia for the procedure.
- Using ultrasound guidance, a laser ablation of the cyst was performed endoscopically.
- The procedure did not result in any immediate or long-term complications.
- Post the evacuation of the accumulated material in the deferent ducts, the stallion resumed normal semen production and was able to impregnate mares in the following breeding season.
Implication of the Study
- The research presents a successful treatment procedure for ejaculatory dysfunction in horses caused by blockages in the ejaculatory pathway.
- This case being the first of its kind in equine science can serve as a valuable reference for veterinary practitioners dealing with similar conditions in stallions.
- It also paves the way for further research and application of human medical procedures in equine treatment.
Cite This Article
APA
Pozor MA, McCarrel TM, Perez Jimenez EE, Macpherson ML, Kelleman AA, Shelton KE.
(2019).
Endoscopic Laser Ablation of a Midline Cyst of the Colliculus Seminalis as a Treatment for Anejaculation in a Stallion.
J Equine Vet Sci, 86, 102896.
https://doi.org/10.1016/j.jevs.2019.102896 Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida. Electronic address: PozorM@ufl.edu.
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida.
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida.
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida.
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida.
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida.
MeSH Terms
- Animals
- Cysts / diagnostic imaging
- Cysts / veterinary
- Ejaculation
- Female
- Horse Diseases / surgery
- Horses
- Laser Therapy / veterinary
- Male
- Semen
- Urethra
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