Myxofibrosarcoma.

Myxofibrosarcoma is a unique subtype of soft tissue sarcoma with a locally infiltrative behavior. High-quality MRI imaging is critical for preoperative planning. Wide surgical resection with a 2 cm soft tissue margin is the mainstay of treatment and can require complex vascular and plastic surgery reconstruction. Local recurrence is common, and a subset of patients with higher-grade lesions will develop distant metastases. Radiation may be beneficial in reducing local recurrence.