title: Carcinoma in papillary cystadenoma lymphomatosum (Warthin's tumor).
abstract: Compared to the number of reported cases of a papillary cystadenoma lymphomatosum, malignant transformation is a rare event. This paper presents the third documented case of squamous cell carcinoma arising in the papillary cystadenoma lymphomatosum in a lymph node of the parotid region. Review of the American literature reveals 5 other cases of malignant transformation of papillary cystadenoma lymphomatosum including two cases of adenocarcinoma and one case of mucoepidermoid carcinoma with an apparent low potential for metastatic spread.
mesh_terms: D000235:Adenolymphoma / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008206:Lymphatic Diseases / Q000473:pathology*; D008297:Male; D008334:Mandible; D008875:Middle Aged