Genital neoplasms treated by en bloc resection and penile retroversion in horses: 10 cases (1977-1986).
Abstract: The medical records of 10 horses with invasive neoplasms of the penis, prepuce, and/or superficial inguinal lymph nodes in which treatment involved en bloc resection and penile retroversion were reviewed. All were geldings and ranged in age from 12 to 25 years (mean, 19 years). Evaluation of biopsy specimens obtained before surgery confirmed lymphosarcoma in 1 horse and squamous cell carcinoma in 9 horses. Typical history included swelling, ulceration, and abscessation of the penis and prepuce and large superficial inguinal lymph nodes. Complications after surgery included dehiscence of the urethrostomy site (4 horses), dehiscence of the ventral skin incision (1 horse), urine scalding of 1 hind limb (1 horse), cystitis (1 horse), severe hemorrhage (1 horse), and diarrhea (1 horse). One horse was euthanatized during hospitalization, because of severe dehydration secondary to diarrhea. At necropsy, firm nodules were scattered in the pulmonary parenchyma, myocardium, thyroid gland, parathyroid glands, cranial mediastinum, kidneys, and hilar lymph nodes. Microscopic examination of the nodules revealed undifferentiated carcinoma. Nine horses were discharged from the hospital between 1 and 5 weeks after surgery. The mean follow-up interval was 27 months (range, 6 to 96 months). Eight horses had no evidence of recurrence. One horse had recurrence of neoplasm at 6 months and was euthanatized 12 months later.
Publication Date: 1988-02-01 PubMed ID: 3356584
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- Journal Article
Summary
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This research paper focuses on the treatment of invasive genital tumors in horses, specifically reviewing 10 cases in which en bloc resection and penile retroversion were used as treatment methods. The study found that out of the 10 horses, one had a recurrence of the tumor after treatment, while the rest exhibited no evidence of recurrence.
Summary of the Research Paper
- The medical records of 10 gelding horses aged between 12 and 25 years, all suffering from invasive neoplasms of the penis, prepuce, or superficial inguinal lymph nodes, were examined in this study.
- The treatment method applied in all cases involved en bloc resection, a surgical procedure performed to remove a tumor along with a margin of healthy tissue, and penile retroversion, a technique used for correcting penile and preputial diseases.
- A biopsy performed before the surgery confirmed malignant tumors, specifically lymphosarcoma in one horse and squamous cell carcinoma in the remaining nine.
- The horses typically presented symptoms of swelling, ulceration, and abscess of the penis and prepuce, and large superficial inguinal lymph nodes.
Post-Surgery Complications
- After the surgery, several complications were observed such as dehiscence (splitting open) of the urethrostomy site in four horses, dehiscence of the ventral skin incision in one horse, urine scalding of one hind limb, cystitis, severe hemorrhage, and diarrhea.
- One horse had to be euthanized due to severe dehydration caused by diarrhea.
- Upon necropsy, solid nodules were found in various parts of the horse’s body. Microscopic examination confirmed these nodules as undifferentiated carcinomas.
Post-Treatment Follow-Up
- The average follow-up period for all horses was 27 months, with a range of 6 to 96 months.
- Of the nine horses discharged from hospital one to five weeks after surgery, one experienced a recurrence of the neoplasm six months after and was euthanized twelve months later.
- The remaining eight horses displayed no evidence of tumor recurrence, indicating the treatment was successful in these cases.
Cite This Article
APA
Markel MD, Wheat JD, Jones K.
(1988).
Genital neoplasms treated by en bloc resection and penile retroversion in horses: 10 cases (1977-1986).
J Am Vet Med Assoc, 192(3), 396-400.
Publication
Researcher Affiliations
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis 95616.
MeSH Terms
- Animals
- Horse Diseases / surgery
- Horses
- Inguinal Canal / surgery
- Lymph Node Excision / veterinary
- Male
- Penile Neoplasms / surgery
- Penile Neoplasms / veterinary
- Penis / surgery
- Retrospective Studies
Citations
This article has been cited 3 times.- Andrade LPR, Dutra HT, Ferreira JA, da Silva JSQ, Bittar MQ, Queiroz PJB. Partial Phallectomy and Penile Retroversion as a Surgical Approach for Severe Preputial Laceration in a Donkey (Equus asinus). Case Rep Vet Med 2025;2025:9036471.
- Saadi A, Azizi S, Farshid AA, Yousefi A. Surgical management of penile sarcoid in a stallion. J Equine Sci 2019;30(4):99-104.
- Straticò P, Varasano V, Celani G, Suriano R, Petrizzi L. Long-Term Outcome of En Bloc Extensive Resection of the Penis and Prepuce Associated with a Permanent Perineal Urethrostomy in a Gelding Affected by Squamous Cell Carcinoma. Case Rep Vet Med 2016;2016:6989450.
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