title: [Testicular germ cell tumors--epidemiology and risk factors].
abstract: An increasing incidence of testicular germ cell tumours has been observed in many white populations in this century. Ethnic genetic implications and lifestyle seem to influence the development of testicular cancers, whereas the influence of intrauterine conditions is under debate. Epidemiologic studies cannot explain the increasing incidence among young men. The age variation of incidence and histologic type indicates at least two different aetiological mechanisms. Testicular cancers among young men are most probably due to gonadal dysgenesis, whereas in old men they reflect the general increased risk of cancer with old age. The increased risk of developing testicular germ cell tumours among cryptorchid young men supports the gonadal dysgenesy hypothesis.
authors.affiliation: Patologisk anatomisk laboratorium Aker sykehus, Oslo.
authors.forename: A
authors.initials: A
authors.lastname: Erichsen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004407:Dysgerminoma / Q000453:epidemiology* / Q000473:pathology; D054278:Embryonal Carcinoma Stem Cells; D006801:Humans; D015994:Incidence; D007223:Infant; D008019:Life Style; D008297:Male; D008875:Middle Aged; D014411:Neoplastic Stem Cells / Q000473:pathology*; D009664:Norway / Q000453:epidemiology; D012307:Risk Factors; D013724:Teratoma / Q000453:epidemiology* / Q000473:pathology; D013736:Testicular Neoplasms / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics
vernacular_title: Testikulaere germinalcellesvulster--epidemiologi og risikofaktorer.