seminoma (redirected from ovarian seminoma)

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

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.