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 foci of necrosis and hemorrhage, and tend to be encapsulated; characteristically, they spread by way of lymphatic vessels, but widespread metastases also occur. SYN: disgerminoma. [dys- + L. germen, a bud or sprout, + G. -oma, tumor]

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dys·ger·mi·no·ma dis-.jər-mə-'nō-mə n, pl -mas also -ma·ta -mət-ə a germinoma of the ovary

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n.
a malignant tumour of the ovary, thought to arise from primitive germ cells; it is homologous to the seminoma of the testis. About 15% of such tumours affect both ovaries; outside the ovary they have been recorded in the anterior mediastinum and in the pineal gland. Dysgerminomas may occur from infancy to old age, but the average age of patients is about 20 years. They are very sensitive both to radiotherapy and chemotherapy.

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dys·ger·mi·no·ma (dis″jər-mĭ-noґmə) [dys- + germ + -oma] the most common malignant ovarian germ cell tumor, composed of large round or polygonal glycogen-rich cells that are frequently radiosensitive and located bilaterally. It is the counterpart of the classical seminoma of the testis. The term germinoma is now used to encompass both the female and male neoplasms.

Dysgerminoma, showing polyhedral tumor cells with round nuclei and adjacent inflammation.


Medical dictionary. 2011.

Look at other dictionaries:

  • dysgerminoma — dys·ger·mi·no·ma …   English syllables

  • dysgerminoma — germinoma; = gonocytoma; n. a malignant tumour of the ovary, thought to arise from primitive germ cells; it is homologous to the seminoma of the testis. About 15% of such tumours affect both ovaries; outside the ovary they have been recorded in… …   The new mediacal dictionary

  • dysgerminoma — dəsˌjərməˈnōmə, (ˌ)dis noun (plural dysgerminomas or dysgerminomata) Etymology: New Latin, from dys + Latin germin , germen sprout, bud, germ + New Latin oma more at germ : a malignant tumor of the ovary arising …   Useful english dictionary

  • Дисгерминома (Dysgerminoma), Герминома (Germinoma), Гоноцитома (Gonocytomd) — злокачественная опухоль яичника, происходящая из незрелых эмбриональных клеток; аналогична ссминоме яичек. Примерно в 15% случаев поражаются оба яичника; помимо яичников были случаи поражения этой опухолью переднего средостения и шишковидного… …   Медицинские термины

  • ovarian seminoma — dysgerminoma …   Medical dictionary

  • germinoma — dysgerminoma …   The new mediacal dictionary

  • gonocytoma — dysgerminoma …   The new mediacal dictionary

  • дисгерминома — (dysgerminoma; дис + лат. germen, germinis росток, зародыш + ома; син.: карцинома яичника эмбриональная, семинома яичника) редкая злокачественная опухоль, развивающаяся из недифференцированных половых клеток яичника …   Большой медицинский словарь

  • Дисгермино́ма — (dysgerminoma; Дис + лат. germen, germinis росток, зародыш + ома; син.: карцинома яичника эмбриональная, семинома яичника) редкая злокачественная опухоль, развивающаяся из недифференцированных половых клеток яичника …   Медицинская энциклопедия

  • Germinoma — Classification and external resources Micrograph of a germinoma. H E stain. ICD O: 9060 9061, M …   Wikipedia

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