title: Squamous cell carcinomas and adenosquamous carcinomas originating from the thyroid gland.
abstract: Three cases of squamous cell carcinoma and 3 cases of mixed squamous and glandular carcinoma were reported. Pathologic differential diagnosis of these rare primary tumors of the thyroid gland were discussed. All except 1 case occurred in elderly patients; their clinical behavior was more aggressive than that of differentiated carcinoma. It is suggested that the tumor be treated more vigorously at its initial stage.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000473:pathology*; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013964:Thyroid Neoplasms / Q000175:diagnosis / Q000473:pathology*