This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Embryonal carcinoma is a type of testicular cancer, which is cancer that starts in the testicles, the male reproductive glands located in the scrotum. It most often develops in young and middle-aged men. It tends to grow rapidly and spread outside the testicle. Embryonal carcinomas are classified as nonseminoma germ cell tumors. Most testicular cancers grow from germ cells, the cells that make sperm. Germ cell tumors are broadly divided into seminomas and nonseminomas because each type has a different prognosis and treatment regimen. Nonseminomas, which are more common, tend to grow more quickly than seminomas. Nonseminoma tumors are often made up of more than one type of cell, and are identified according to the different cell types.
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