Recurrent preputial sarcoids in a miniature donkey

Sarcoids are common dermal neoplasms that have predilection for paragenital tissues in jacks. Sarcoids have variable appearance, do not metastasize but may be locally invasive and certain forms may grow rapidly. Various treatment options are available for preputial sarcoids, including surgical excision for large masses. We describe a case of mixed sarcoid affecting the preputial tissues of a miniature donkey gelding that was excised, regrew, and required a second surgical procedure involving preputial ablation.