title: Adenocarcinoma arising within a testicular metastasis.
abstract: Teratoma with malignant transformation is defined as the emergence of a non-germ cell tumor from a teratoma. Although extremely rare in extraovarian sites, cases have been reported that involve primary extragonadal germ cell tumors with transformation to variants of sarcoma. We report a 54-year-old man who was found to have adenocarcinoma arising within a mature teratomatous retroperitoneal metastasis 15 years after treatment of a nonseminomatous testicular germ cell tumor. The tumor was successfully excised and he remains without evidence of disease.
authors.affiliation: Department of Pathology, Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Murphy
authors.forename: E
authors.initials: E
authors.lastname: Bancila
authors.forename: R G
authors.initials: RG
authors.lastname: Ciocca
authors.forename: K B
authors.initials: KB
authors.lastname: Cummings
authors.forename: R E
authors.initials: RE
authors.lastname: Weiss
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D018237:Germinoma / Q000556:secondary*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000473:pathology*; D012186:Retroperitoneal Neoplasms / Q000556:secondary*; D013736:Testicular Neoplasms / Q000473:pathology*