Sialolith.
D000368:Aged; D006801:Humans; D008297:Male; D011859:Radiography; D012465:Salivary Duct Calculi / Q000000981:diagnostic imaging*; D012466:Salivary Gland Diseases / Q000000981:diagnostic imaging*; D013364:Submandibular Gland Diseases / Q000000981:diagnostic imaging*