title: Diagnosis of a contralateral second testicular carcinoma by F18-FDG PET.
abstract: BACKGROUND
  In testicular carcinoma the early diagnosis is very important because with an early therapy there are good chances for long-term survival (50-90%). Metastases of a testicular carcinoma are at first lymphogenous, hematogenous only in late stages.
  
  
  METHODS
  This is a case report about a 28-year-old man, whose testicular carcinoma (left testis) had already been operated on (unripe teratoma with parts of an embryonic carcinoma, an endodermal sinus tumor and a chorion carcinoma). Because of the elevated tumor marker AFP an FDG PET (F18-fluorodeoxyglucose positron emission tomography) investigation was made. CT (covering thorax, abdomen and pelvis) and ultrasound of the testis showed no pathological results. In the FDG PET a significant pathological FDG uptake in the right testis was found. Histology showed an unripe teratoma with parts of an embryonic carcinoma, an endodermal sinus tumor, and a chorion carcinoma. It was a second carcinoma of the contralateral testis.
  
  
  CONCLUSIONS
  F18-FDG PET was a sensitive and reliable modality for diagnosis in this patient.
authors.affiliation: Universitätsklinik für Radiologie, Klinische Abteilung für Nuklearmedizin, Graz, Austria. ge.wolf@kfunigraz.ac.at
authors.forename: G
authors.initials: G
authors.lastname: Wolf
authors.forename: R M
authors.initials: RM
authors.lastname: Aigner
authors.forename: T
authors.initials: T
authors.lastname: Schwarz
authors.forename: P
authors.initials: P
authors.lastname: Krippl
authors.forename: H
authors.initials: H
authors.lastname: Samonigg
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D016609:Neoplasms, Second Primary / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D013736:Testicular Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D013737:Testis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D014055:Tomography, Emission-Computed
chemical_list: D019788:Fluorodeoxyglucose F18