Summary
Ten horses with histologically confirmed squamous cell carcinoma (scc) and 1 horse with presumptive scc of the external genitalia were treated with a combination of surgical debridement and topical administration of 5-fluorouracil, or with topical treatment alone. Tumor remission was obtained in all horses except 1 in which owner compliance was deficient, and no recurrences have been reported. Topical use of 5-fluorouracil as a chemotherapeutic agent for treatment of genital lesions of scc in horses should be considered as a viable alternative to radical surgical excision.
