Accessory lobe of the submandibular gland.
D000368:Aged; D001943:Breast Neoplasms; D003937:Diagnosis, Differential; D005260:Female; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D007972:Leukoplakia, Oral; D009362:Neoplasm Metastasis / Q000000981:diagnostic imaging; D010159:Palate; D012796:Sialography; D013363:Submandibular Gland / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000196:embryology