reviewJAMAFeb 3, 2025Closed access

Testicular Germ Cell Tumors

Johns Hopkins University · Johns Hopkins Medicine · +4 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Importance: Testicular cancer is the most common solid malignancy among males aged 15 to 40 years in the US, with approximately 10 000 new cases diagnosed each year. Between 90% and 95% of testicular cancers are germ cell tumors (GCTs). Observations: The mean age at diagnosis for testicular cancer is 33 years. GCTs are categorized as seminomas and nonseminomatous GCTs (NSGCTs) based on their embryonic origins and path of differentiation. Risk factors include cryptorchidism, family history of testicular cancer, gonadal dysgenesis, infertility, cannabis use, and genetic conditions such as Klinefelter syndrome. The most common presenting symptom of testicular cancer is a painless testicular mass. History,…

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