Unusual Presentation of Synovial Sarcoma as Meniscal Cyst: A Case Report

Document Type : CASE REPORT

Authors

ShafaYahyaian Hopital, Iran University of Medical Sciences, Tehran, Iran

Abstract

 
Periarticular cyst and cystic soft tissue lesion around the knee are common. Synovial sarcoma is a rare and malignant soft tissue tumor accounting for approximately 5% of soft tissue sarcoma. A case is presented where a lesion adjacent to the joint line of the knee was diagnosed clinically and on imaging as a meniscal cyst. MRI signal was homogenous and no concomitant meniscal tears were seen. The tissue diagnosis was monophasic synovial sarcoma.

Keywords


  1. McCarthy CL, McNally EG. The MRI appearance of cystic lesions around the knee. Skeletal Radiol. 2004; 33(4):187-209.
  2. Telischak NA, Wu JS, Eisenberg RL. Cysts and cystic-appearing lesions of the knee: A pictorial essay. Indian J Radiol Imaging. 2014; 24(2):182-91.
  3. Mountney J, Thomas NP. When is a meniscal cyst not a meniscal cyst? Knee. 2004; 11(2):133-6.
  4. Jones BC, Sundaram M, Kransdorf MJ. Synovial sarcoma: MR imaging findings in 34 patients. AJR Am J Roentgenol. 1993; 161(4):827-30.
  5. Heckman J, Witkiewicz A, Berger AC. Cystic synovial sarcoma of the lower extremity: A case report and review of the literature. Surg Sci. 2011; 2(2):62-5.
  6. Seger BM, Woods GW. Arthroscopic management of lateral meniscal cysts. Am J Sports Med. 1986; 14(2):105–8.
  7. Ryu RK, Ting AJ. Arthroscopic treatment of meniscal cysts. Arthroscopy. 1993; 9(5):591–5.
  8. Tasker AD, Ostlere SJ. Relative incidence and morphology of lateral and medial meniscal cysts detected by magnetic resonance imaging. Clin Radiol. 1995; 50(11):778–81.
  9. Cadman NL, Soule EH, Kelly PJ. Synovial sarcoma: an analysis of 134 tumors. Cancer. 1965; 18(5):613–27.
  10. Ishida T, Iijima T, Moriyama S, Nakamura C, Kitagawa T, Machinami R. Intra-articular calcifying synovial sarcoma mimicking synovial chondromatosis. Skeletal Radiol. 1996; 25(8):766–9
  11. Jones BC, Sundaram M, Kransdorf MJ: Synovial sarcoma: MR imaging findings in 34 patients. AJR Am J Roentgenol. 1993; 161(4):827-30.
  12. Nakanishi H, Araki N, Sawai Y, Kudawara I, Mano M, Ishiguro S, et al. Cystic synovial sarcomas: imaging features with clinical and histopathologic correlation. Skeletal Radiol. 2003; 32(12):701–7.
  13. Fisher C. Synovial sarcoma. Ann Diagn Pathol. 1998; 2(6):401-21.
  14. Stein D, Cantlon M, Mackay B, Hoelscher C. Cysts about the knee: evaluation and management. J Am Acad Orthop Surg. 2013; 21(8):469-79.
  15. Mills CA, Henderson IJ. Cysts of the medial meniscus. Arthroscopic diagnosis and management. J Bone Joint Surg Br. 1993; 75(2):293-8.
  16. De Maeseneer M, Shahabpour M, Vanderdood K, Machiels F, De Ridder F, Osteaux M. MR imaging of meniscal cysts: Evaluation of location and extension using a three-layer approach. Eur J Radiol. 2001; 39(2):117-24.