Myxofibrosarcoma and Undifferentiated Pleomorphic Sarcoma
- Myxofibrosarcoma has characteristic infiltrative borders that can be seen as T2 hyperintense “tails” on MRI and require a 2 cm clinical resection margin to minimize the incidence of positive margins.
- The entity formerly known as malignant fibrous histiocytoma is now known as undifferentiated pleomorphic sarcoma and is considered a diagnosis of exclusion.
- Improved knowledge of risk factors for local and distant recurrence helps guide the use of radiation therapy and chemotherapy, as well as follow-up strategies.