myxoma


myxoma
A benign neoplasm derived from connective tissue, consisting chiefly of polyhedral and stellate cells that are loosely embedded in a soft mucoid matrix, thereby resembling primitive mesenchymal tissue; occurs frequently intramuscularly (where it may be mistaken for a sarcoma), also in the jaw bones, and encysted in the skin (focal mucinosis and dorsal wrist ganglion). [myxo- + G. -oma, tumor]
- atrial m. a primary cardiac neoplasm arising most commonly in the left atrium as a soft polypoid mass attached by a stalk to the atrial septum; it may resemble an organized mural thrombus, and the symptoms may include cardiac murmurs, which change with alteration of body position and signs of mitral stenosis or insufficiency, with continuous danger of embolism by fragments of the tumor or its entire mass.
- m. enchondromatosum SYN: myxochondroma.
- m. fibrosum SYN: myxofibroma.
- m. lipomatosum SYN: myxolipoma.
- odontogenic m. a benign, expansile, multilocular radiolucent neoplasm of the jaws consisting of myxomatous fibrous connective tissue; presumably derived from the mesenchymal components of the odontogenic apparatus.
- m. sarcomatosum SYN: myxosarcoma.

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myx·o·ma mik-'sō-mə n, pl -mas also -ma·ta -mət-ə a soft tumor made up of gelatinous connective tissue resembling that found in the umbilical cord
myx·o·ma·tous -mət-əs adj

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n.
a benign gelatinous tumour of connective tissue. Atrial myxoma is a tumour of the heart, usually of the left side, arising from the septum dividing the two upper chambers. Symptoms may include fever, lassitude, joint pains, and sudden loss of consciousness due to obstruction of the bloodflow. The tumour may be wrongly diagnosed as stenosis of the mitral valve as it can produce a similar murmur. Treatment requires surgical removal.
myxomatous adj.

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myx·o·ma (mik-soґmə) pl. myxomas, myxoґmata [myx- + -oma] a benign tumor composed of primitive connective tissue cells and stroma resembling mesenchyme. Called also colloid tumor, gelatinous tumor, and mucous tumor. myxomatous adj

Medical dictionary. 2011.

Look at other dictionaries:

  • Myxoma — Myx*o ma, n.; pl. {Myxomata}. [NL., fr. Gr. ? mucus + oma.] (Med.) A tumor made up of a gelatinous tissue resembling that found in the umbilical cord. [1913 Webster] …   The Collaborative International Dictionary of English

  • Myxōma — (griech.), s. Schleimgewebsgeschwulst …   Meyers Großes Konversations-Lexikon

  • myxoma — [mik sō′mə] n. pl. myxomas or myxomata [mikmə tə] [ MYX(O) + OMA] a tumor of connective tissue cells containing a mucuslike material myxomatous [mik sō′ mətəs] adj …   English World dictionary

  • Myxoma — For the atrial subtype, see Atrial myxoma. For the virus, see Myxoma virus. Myxomatous redirects here. It is not to be confused with Myxomatosis. Myxoma Classification and external resources …   Wikipedia

  • myxoma — n. a benign gelatinous tumour of connective tissue. Atrial myxoma is a tumour of the heart, usually of the left side, arising from the septum dividing the two upper chambers. Symptoms may include fever, lassitude, joint pains, and sudden loss of… …   The new mediacal dictionary

  • myxoma — noun (plural mas; also myxomata) Etymology: New Latin, from Greek myxa Date: 1870 a soft tumor made up of gelatinous connective tissue like that of the umbilical cord • myxomatous adjective …   New Collegiate Dictionary

  • myxoma — myxomatous /mik som euh teuhs/, n. /mik soh meuh/, n., pl. myxomas, myxomata / meuh teuh/. Pathol. a soft tumor composed of connective and mucoid tissue. [1865 70; < NL; see MYX , OMA] * * * …   Universalium

  • myxoma — noun A tumor of primitive connective tissue …   Wiktionary

  • myxoma — mɪk səʊmÉ™ n. soft tumor of mucoid tissue (Pathology) …   English contemporary dictionary

  • myxoma — [mɪk səʊmə] noun (plural myxomas or myxomata mətə) Medicine a benign tumour of connective tissue containing mucous or gelatinous material. Derivatives myxomatous adjective …   English new terms dictionary


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