Yolk sac tumor

Yolk sac tumor: This tumor is the most common form of testicular cancer in infants and young boys and it resembles the yolk sac of an early human embryo. When they occur in young children, these tumors are usually treated successfully.

Yolk sac tumors: Tumors that make a hormone called alpha-fetoprotein (AFP).
Germinomas: Tumors that make a hormone called beta-human chorionic gonadotropin (β-hCG).

endodermal sinus tumor or yolk sac tumors
Endodermal sinus tumor or yolk sac tumors are germ cell tumors that are most often malignant, but may also be benign.

The histologic types of germ cell tumors include germinoma, teratoma (mature, immature, and with malignant transformation), yolk sac tumor, embryonal carcinoma, and choriocarcinoma.

Endodermal sinus tumor (EST), also known as yolk sac tumor (YST), is a member of the germ cell tumor group of cancers. It is the most common testicular tumor in children under 3, and is also known as infantile embryonal carcinoma.

The most common types of testicular cancers are seminomas and nonseminomas (teratoma, choriocarcinoma, embryonal carcinoma, or yolk sac tumor), which develop from the cells. Each type grows, spreads, and is treated differently.

Yolk sac tumor
A stromal tumor is a rare type of testicular tumor. Such tumors are usually not cancerous. The two main types of stromal tumors are Leydig cell tumors and Sertoli cell tumors.

Nonseminomas are a group of cancers that sometimes occur in combination, including choriocarcinoma, embryonal carcinoma, and yolk sac tumors. Nonseminomas arise from more mature, specialized germ cells and tend to be more aggressive than seminomas.

Nonseminoma. This group of cancers includes choriocarcinoma, embryonal carcinoma, teratoma and yolk sac tumors. These types of cancer tend to develop earlier in life than seminomas, usually occurring in men between their late teens and early 40s.

Nonseminomas are actually a group of cancers and comprise 60 percent of cases. They include choriocarcinoma, embryonal carcinoma, teratoma, and yolk sac tumors.

During surgery, there is about a 45% chance that only scar tissue will be found, a 45% chance there will be teratoma, and about a 10% chance of some other type of germ cell tumor (for example, embryonal carcinoma, seminoma, yolk sac tumor, ...

Nonseminomas include embryonal carcinoma, teratoma, choriocarcinoma, and yolk sac tumor.

Thus, these tumors often are "mixed," that is, they are made up of more than one tumor type. Typical components include choriocarcinoma, embryonal carcinoma, immature teratoma, and yolk sac tumors.

Nonseminoma (non-sem-i-NO-ma): A classification of testicular cancers that arise in specialized sex cells called germ cells. Nonseminomas include embryonal carcinoma, teratoma, choriocarcinoma, and yolk sac tumor.

Seminomas may be one of three types: classic, anaplastic, or spermatocytic. Types of nonseminomas include choriocarcinoma, embryonal carcinoma, teratoma, and yolk sac tumors. Testicular tumors may contain both seminoma and nonseminoma cells.

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Seminomas start in the cells that make sperm. Nonseminomas are a group of cancers that include choriocarcinoma, embryonal carcinoma, teratoma, and yolk sac tumors. A testicular cancer may have a combination of both types.

See also: Teratoma, Choriocarcinoma, Carcinoma, Cancer, Embryonal carcinoma