Pleomorphic rhabdomyosarcoma is a type of rhabdomyosarcoma, and is the least common, accounting for only 5% of all rhabdomyosarcomas. Unlike embryonal and pleomorphic types, these tumours occur in adults over the age of 40 years1, and are difficult to distinguish from other pleomorphic sarcomas such as malignant fibrous histiocytomas 2. They typically occur in the limbs, with a predilection for the the thigh 2.
The features are non-specific (see radiographic features in the parent article: rhabdomyosarcoma), although in general pleomorphic rhabdomyosarcomas have multiple areas of necrosis. In some instances these areas are surrounded by pronounced ring like enhancement 1.
- 1. Schepper AM, Parizel PM, Vanhoenacker FM. Imaging of soft tissue tumors. Springer Verlag. (2006) ISBN:3540248099. Read it at Google Books - Find it at Amazon
- 2. Kransdorf MJ, Murphey MD. Imaging of soft tissue tumors. Lippincott Williams & Wilkins. (2006) ISBN:0781747716. Read it at Google Books - Find it at Amazon