title: Tumor-to-tumor metastasis: Warthin tumor as a recipient of lung carcinoma and of renal carcinoma - Report of two cases.
abstract: Tumor-to-tumor metastasis is an exceedingly rare event with only about 100 cases reported in the English written literature. We report two cases of a 65-year-old man with duplicity of colonic and lung adenocarcinomas who presented with swelling of the left parotid gland, and of a 75-year-old man who presented with swelling of the right parotid gland. Microscopical and immunohistochemical examination showed metastasis of lung carcinoma and of renal carcinoma, respectively, to Warthin tumor as the first clinical manifestation of the malignancy in the latter case. To the best of our knowledge, such a phenomenon has not been reported so far.
authors.affiliation: The Fingerland Department of Pathology, Charles University Faculty of Medicine and Faculty Hospital in Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic. lacoj@lfhk.cuni.cz
authors.forename: Jan
authors.initials: J
authors.lastname: Laco
authors.forename: Petr
authors.initials: P
authors.lastname: Celakovsky
authors.forename: David
authors.initials: D
authors.lastname: Kalfert
authors.forename: Helena
authors.initials: H
authors.lastname: Hornychova
authors.forename: Tomas
authors.initials: T
authors.lastname: Rybnikar
authors.forename: Ales
authors.initials: A
authors.lastname: Ryska
mesh_terms: D000230:Adenocarcinoma / Q000556:secondary*; D000235:Adenolymphoma / Q000473:pathology*; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000556:secondary*; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology*; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology; D010307:Parotid Neoplasms / Q000473:pathology*