Treatment of squamous cell carcinoma involving the buccal pouch in a crab-eating macaque.

Persistent swelling of the left buccal pouch was noticed in an adult female crab-eating macaque (Macaca fascicularis). A mass involving almost the entire musculature of the pouch was removed surgically. The histopahtologic diagnosis was squamous cell carcinoma. Recurrence of the mass was treated by a combination of surgical excision and radiation therapy.