Successful treatment of oral squamous cell carcinoma with intralesional fluorouracil in a Malayan tapir (Tapirus indicus).

An oral mass was observed in a Malayan tapir (Tapirus indicus). Squamous cell carcinoma was diagnosed by histologic examination of a biopsy specimen. A series of intralesional injections using fluorouracil resulted in complete regression of the neoplasm with no recognized adverse effects.