classical seminoma

classical seminoma
the most common type of seminoma, composed of well-differentiated sheets or cords of polygonal or round cells; it usually occurs in the fourth decade or later.

Classical seminoma, with cells characterized by large nuclei, prominent nucleoli, abundant clear cytoplasm, and sharply outlined cell membranes.

Medical dictionary. 2011.

Look at other dictionaries:

  • seminoma — A radiosensitive malignant neoplasm usually arising from germ cells in the testis of young male adults which metastasizes to the paraortic lymph node s; a counterpart of dysgerminoma of the ovary. [L. semen, seed (semen) + G. oma …   Medical dictionary

  • spermatocytic seminoma — a type of seminoma whose cells resemble maturing spermatogonia and have characteristic filamentous chromatin; it occurs later in life and has a lower metastatic potential and better prognosis than classical seminoma …   Medical dictionary

  • anaplastic seminoma — name given to a subgroup of classical seminoma that is particularly aggressive and invasive and produces large amounts of tumor marker. This term is now falling into disuse …   Medical dictionary

  • dysgerminoma — A malignant neoplasm of the ovary (counterpart of seminoma of the testis), composed of undifferentiated gonadal germinal cells and occurring more frequently in patients less than 20 years of age. The neoplasms are gray yellow and firm, contain… …   Medical dictionary

  • Teratoma — Classification and external resources Micrograph of a teratoma showing tissue from all three germ layers: mesoderm (immature cartilage left upper corner of image), endoderm (gastrointestinal glands cente …   Wikipedia

  • endocrine system, human — ▪ anatomy Introduction  group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …   Universalium

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