What is a Myxomatous lesion?
Myxoid soft-tissue lesions are a heterogeneous group of benign and malignant mesenchymal tumors with an abundance of extracellular mucoid material. These lesions may mimic cysts on radiologic evaluation because of the high water content, and histopathologic features also overlap.
What is an intramuscular lesion?
Lesions are commonly intramuscular, and involve the lower extremity (i.e., thigh) more frequently than the upper. On US, a heterogeneous, multilobulated, typically well-defined mass is noted. CT and MR show a well-defined, lobulated, predominantly fat-intensity lesion with foci of nonadiposity within.
What is a Myxomatous tumor?
A myxoma is a primary heart (cardiac) tumor. This means that the tumor started within the heart. Most heart tumors start somewhere else. Primary cardiac tumors such as myxomas are rare. About 75% of myxomas occur in the left atrium of the heart.
What is intramuscular myxoma?
Intramuscular myxoma (IM) is a benign soft-tissue tumor that presents as a deeply seated mass confined to skeletal muscle. Surgical excision is virtually always curative. Recurrence, even after incomplete resection, is exceptional.
What causes myxofibrosarcoma?
DNA mutations in soft tissue sarcoma are common. But they’re usually acquired during life rather than having been inherited before birth. Acquired mutations may result from exposure to radiation or cancer-causing chemicals. In most sarcomas, they occur for no apparent reason.
What is a intramuscular myxoma?
Can a myxoma be malignant?
Although atrial myxomas are considered as benign tumors, their ability to recur and display malignant features has been reported. Incomplete removal of the primary tumors, multifocal disease, and familial predisposition are considered to contribute to the recurrence and the malignant potential of atrial myxomas.
Is a myxoma benign?
A myxoma is a benign (non-cancerous) growth in the heart. Myxomas can be as small as a few millimetres or grow to a few centimetres. Most myxomas develop in the area of the heart called the atrium, which is the top left chamber of the heart.
What is an intramuscular myxoma?
Where does an intramuscular myxoma usually occur?
Introduction: Intramuscular myxoma is a rare benign soft tissue tumor involving the musculoskeletal system. The incidence is reported as varying from 0.1 to 0.13 per 100,000 population. Most patients present between the fifth and sixth decade of life. The swelling commonly occurs in the large muscles of the thigh, shoulder, buttocks and arms.
How old do you have to be to have an intramuscular myxoma?
Intramuscular Myxomas are benign soft tissue tumors that present as slow-growing deeply seated masses confined within the skeletal muscle. The condition is typically seen in patients between 40 and 60 years of age who present with a slow-growing mass that may or may not be painful.
How are fibrous dysplasia and intramuscular myxomas related?
When occurring in conjunction with fibrous dysplasia they are typically located in the vicinity of the bone lesions. Both fibrous dysplasia and intramuscular myxomas most commonly affect the pelvic girdle and lower limbs (75%). The upper limbs are affected in less than a quarter of reported cases.
Can a myxoma be a soft tissue sarcoma?
The intramuscular myxomas involve larger muscle groups, can be seen in elderly, and can reach relatively big sizes, as seen in many soft tissue sarcomas, making it very difficult to distinguish it from them. Despite having a seemingly encapsulated look and well defined borders, the lesion microscopically infiltrates the muscle .