Seminoma

A radiosensitive, malignant neoplasm of the testis, thought to be derived from primordial germ cells of the sexually undifferentiated embryonic gonad. There are three variants: classical (typical), the most common type; anaplastic; and spermatocytic. The classical seminoma is composed of fairly well differentiated sheets or cords of uniform polygonal or round cells (seminoma cells), each cell having abundant clear cytoplasm, distinct cell membranes, a centrally placed round nucleus, and one or more nucleoli. In the female, a grossly and histologically identical neoplasm, known as dysgerminoma, occurs. (Dorland, 27th ed)

Year introduced: 1994

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Tree Number(s): C04.557.465.330.800

MeSH Unique ID: D018239

Entry Terms:

• Seminomas

Previous Indexing:

• Dysgerminoma (1966-1993)

All MeSH Categories
Diseases Category
Neoplasms
Neoplasms by Histologic Type
Neoplasms, Germ Cell and Embryonal
Germinoma
Seminoma