In the international classification of soft tissue tumors - WHO Classification of Soft Tissue Tumors (4th edition of 2013) - among all classes of benign tumors, the definition of "myxoma" is found in the class of tumors of uncertain differentiation (G9).
Experts have identified such types as: intramuscular myxoma, periarticular myxoma, surface angiomyxoma, deep (locally aggressive) angiomyxoma, dermal myxoma of the nervous membranes (neurotec).
Myxoma of the heart is not distinguished in this classification, but at the same time, cardiologists note the following types: atrial myxomas - of the left atrium (usually detected after 40 years) or of the right atrium (localized on the atrial septum); ventricular myxomas (formed in the ventricles of the heart), mitral valve (it happens extremely rarely).
Intramuscular myxoma is formed in the depths of the skeletal muscles of the upper and lower extremities - thigh myxoma, leg myxoma; in the muscle tissue of the shoulders or the buttocks. A tumor can occur in isolation, as well as in combination with Albright syndrome. Multiple formations in the muscle tissues on the background of fibrous dysplasia (replacement of the bone tissue of the fibrous) are defined as Masebroud syndrome.
Periarticular myxoma can be found in the shoulder or elbow; in the area of the knee (88% of cases), hip, ankle or heel. Doctors note the risk factors for the occurrence of such formations: osteoarthritis of the joint or previously suffered injuries.
The locally invasive species includes myxoma of the jaw - a rare intraosseous neoplasm, most often occurring in the lower jaw. It is classified as a slowly growing odontogenic tumor, that is, formed from the mesenchymal part of the tooth germ. Possible myxoma on the palate in the mouth, on the gum or cheek.
Using hardware imaging, tumors of this group can be determined at the base of the skull and on the temporal bone, in the neck, as well as the left-sided supraclavicular (near-clavicular) formation or myxoma of the right supraclavicular region.
In adults, along with serous and mucin cysts or pelvic arteriovenous malformations, a primary pelvic retroperitoneal neoplasm, such as a pelvic myxoma or a hip retroperitoneal myxoma, is found in CT and MRI.
Benign tumors that form in the retroperitoneal space: extraorganic aggressive angiomyxoma or myxoma of the abdominal cavity, as well as the appendix of the cecum (appendix), which is often diagnosed as a mucocele (mucous cyst) of the appendix, which can be associated with peritoneal pseudomyxus (I can be attached (I will be attached), and I will be attached to the syndromes (the mucous cyst) of the appendix, which can be associated with peritoneal pseudomyxus (I will be attached by the beat of the blasts, and I will be studed by my-20s). Or cystadenoma).
Also aggressive (infiltrative) angiomyxoma can be anogenital - myxoma of the labia, vulvovaginal area and perineum, and its appearance is most likely in patients at the age of menopause.
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