Malignant tumours of the submandibular gland.
D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D011379:Prognosis; D012468:Salivary Gland Neoplasms / Q000145:classification / Q000401:mortality / Q000532:radiotherapy / Q000601:surgery; D013363:Submandibular Gland