NCIt definition : A low malignant potential soft tissue neoplasm of uncertain differentiation. It typically
affects young patients, presenting as a slowly growing nodular or cystic tumor mass,
most often in the subcutaneous tissues of the extremities. Occasionally, patients
have systemic symptoms (anemia, fever, and weight loss). This tumor has a relatively
good prognosis. A minority of patients develop local recurrences. Metastases are rare.;