title: Papillary carcinoma arising in a papillary cystadenoma of thyroid: a case report.
abstract: Papillary cystadenoma of the thyroid is a controversial pathologic entity, the existence of which is not universally accepted. Its malignant potential is unknown, with only scant evidence that it may be a rare precursor of the papillary carcinoma. A case is presented as a pathologically documented instance of malignancy arising in a papillary cystadenoma in a 33-year-old woman. The clinical implications of this finding are discussed.
mesh_terms: D000328:Adult; D002291:Carcinoma, Papillary / Q000209:etiology / Q000473:pathology*; D003537:Cystadenoma / Q000150:complications / Q000473:pathology*; D005260:Female; D006801:Humans; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D013964:Thyroid Neoplasms / Q000150:complications / Q000473:pathology*