equis - Articles
Penis: phallectomy – Vinsot technique
Introduction
- Vinsot’s technique is one of a number of techniques of partial phallectomy in stallions, ie removal of part of the penis.
- Vinsot’s is the most surgically simple technique of partial phallectomy.
- Vinsot’s technique essentially creates a urethral stoma proximal to the site of penile amputation, and then amputates the penis distal to the urethral stoma so leaving a penile stump through which urine exits via the ventral urethral stoma.
Uses
- Permanent penile paralysis accompanied by irreparable penile damage Penis: paralysis / priapism.
- Extensive penile neoplasia for which more conservative methods of treatment or surgery (eg cryotherapy, local excision, segmental posthetomy (‘reefing’)) are insufficient or have failed, especially if the tunica albuginea has been invaded or other treatments have failed - squamous cell carcinoma, melanoma Penis: neoplasia.
- Geldings with urethral stenosis distal to prepucial orifice.
Advantages
- Good success in squamous cell carcinoma of the penis, especially the glans, if removed with wide margin.
Disadvantages
- Usually (unless the glans penis only is amputated, in which case in some stallions only ability to copulate may be preserved) renders stallions unable to copulate, not for use in breeding stallions.
- Requires general anesthesia Anesthesia: general - overview.
- Not suitable for neoplasia removal if evidence of lymphatic spread which would require en bloc resection.
Alternative techniques
- William technique Penis: phallectomy - William technique.
- Scott technique Penis: phallectomy - Scott technique.
Time required
Preparation
- General anesthetic Reproduction: anesthesia induction and maintenance: 20 min.
Procedure
- 45-75 min.
Decision taking
Criteria for choosing test
- Penile paralysis Penis: paralysis / priapism.
- Urethral stenosis.
- Penile neoplasia Penis: neoplasia.
- Penile trauma Penis: trauma.
Risk assessment
- Post-operative hemorrhage.
- Dehiscence with stricture.
- Infection.
Requirements
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Preparation
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Technique
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Aftercare
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Outcomes
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Further Reading
Publications
Refereed papers
- Recent references from PubMed and VetMedResource.
- Rizk A, Mosbah E, Karrouf G & Abou Alsoud M (2013) Surgical Management of penile and preputial neoplasms in equine with special reference to partial phallectomy. J Vet Med, 891413 PubMed.
- Arnold C E, Brinsko S P, Love C C & Varner D D (2010) Use of a modified Vinsot technique for partial phallectomy in 11 standing horses. JAVMA 237 (1), 82-86.
- Perkins J D, Schumacher J, Waguespack R W & Hanrath M (2003) Penile retroversion and partial phallectomy in a standing horse. Vet Rec 153 (6), 184-185 PubMed.
- Mair T S, Walmsley J P & Phillips T J (2000) Surgical treatment of 45 horses affected by squamous cell carcinoma of the penis and prepuce. Equine Vet J 32 (5), 406-410 PubMed.
Other sources of information
- Schumacher J & Varner D D (2011) Surgery of the Penis and Prepuce. In: Equine Reproduction. Eds: McKinnon A O, Squires E L, Vaala W E & Varner D D. Blackwell Publishing Ltd, UK. pp 1562-1571.