title: Signet-ring cell microfollicular adenoma arising in a nodular ectopic thyroid. A case report.
abstract: A symptomless submandibular mass removed from a 61-year-old white male proved to be a signet-ring microfollicular adenoma arising in ectopic thyroid tissue. The lesion was established as a primary, non-mucin producing thyroid adenoma and a diagnosis of secondary signet-ring adenocarcinoma excluded.
mesh_terms: D000236:Adenoma / Q000473:pathology*; D002828:Choristoma / Q000473:pathology*; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013964:Thyroid Neoplasms / Q000473:pathology*