seminoma (redirected from seminomas)

seminoma /sem·i·no·ma/ (-no´mah) a radiosensitive, malignant neoplasm of the testis, thought to be derived from primordial germ cells of the sexually undifferentiated embryonic gonad. Cf. germinoma.

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classical seminoma  the most common type, composed of well-differentiated sheets or cords of polygonal or round cells (seminoma cells).

ovarian seminoma  dysgerminoma.

spermatocytic seminoma  a less malignant form characterized by cells resembling maturing spermatogonia with filamentous chromatin.

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sem·i·no·ma (sm-nm)

n. pl. sem·i·no·mas or sem·i·no·ma·ta (-m-t)

A malignant tumor of the testis arising from sperm-forming tissue.

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seminoma

[sem′inō′mə] pl. seminomas, seminomata

Etymology: L, semen + oma, tumor

a malignant tumor of the testis. It is the most common testicular tumor and is believed to arise from the seminiferous epithelium of the mature or maturing testis. The two types are classic, or typical, and spermatocytic; anaplastic seminoma is a variant of the classic type. Compare dysgerminoma.

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seminoma

tumor of the testis thought to arise from basal spermatogonia. They are common in older dogs and occur often in cryptorchid testes. Seminomas also occur in the male of other domestic species.

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seminoma

Lance Armstrong tumor Urology A testicular germ-cell neoplasm and most common tumor of ♂ < age 40 Clinical Mass, ± pain Management Excision, RT Prognosis ± 90% 5-yr survival if treated early. See Anaplastic seminoma, Germ cell tumor, Spermatocytic seminoma.