Management of perianal squamous cell carcinoma with permanent colostomy in a mare.

The study examines a case of perianal squamous cell carcinoma in a 28-year-old Pinto mare. The horse was evaluated and treated with a permanent colostomy, which aided in managing her condition for about 14 months before a decline in her health required euthanasia.

Introduction

• The research paper presents a study conducted on a mare suffering from perianal squamous cell carcinoma. The disease is a type of skin cancer that occurs more commonly in areas exposed to the sun or exposed to chronic irritation. In this case, the mare presented signs of lethargy, inappetence, weight loss, dyschezia, and hematochezia, all indicators of possible carcinoma.

Diagnosis

• The mare’s physical signs led to a review of its medical condition. The tumor was found in various parts of the mare’s vulva, perineum, and anus, with a rectal fistula found to the left of the anus.

Treatment

• Rather than additional treatment for the carcinoma, the decision was made to manage the mare’s discomfort and potential for infection by performing a permanent end-on colostomy. Colostomy is a surgical procedure that creates an opening for the colon to the surface of the body, providing an alternative path for waste material to leave the body.

Outcome

• Following the surgery, the colostomy performed its function satisfactorily, leading to the stabilization of the mare’s condition for the following 14 months. However, unfortunately, the mare’s health began to deteriorate with the resurfacing of lethargy and inappetence accompanied by weakness. This decline in health eventually led to the decision for euthanasia.

Conclusion

• In conclusion, this case study presents a possible management option for perianal squamous cell carcinoma in horses via the application of a permanent colostomy. It may not eliminate the carcinoma, but this approach can help in managing the symptoms and improving the quality of life for the affected animal for a time.