RT Journal Article SR Electronic T1 Primary Retropharyngeal Synovial Sarcoma JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 811 OP 812 DO 10.3174/ajnr.A1333 VO 30 IS 4 A1 Shi, H. A1 Wang, S. A1 Wang, P. A1 Yu, Q. YR 2009 UL http://www.ajnr.org/content/30/4/811.abstract AB SUMMARY: Synovial sarcoma is the third most common histologic type of extremity soft tissue sarcoma. However, primary retropharyngeal synovial sarcoma is extremely rare. We present a case of primary retropharyngeal synovial sarcoma in a 60-year-old woman. The radiographic imaging of our present cases was characteristic of a heterogeneously enhancing mass.