Monarch Disease Ontology id MONDO_0044925 (oral cavity carcinoma) is a carcinoma arising in the oral cavity. Most oral cavity carcinomas are squamous cell carcinomas of the tongue, buccal mucosa, or gums. Less frequent morphologic variants include mucoepidermoid carcinoma and adenocarcinoma. Also known as: carcinoma of mouth, carcinoma of oral cavity, carcinoma of the oral cavity, mouth carcinoma.