J Korean Orthop Assoc.  2016 Jun;51(3):266-271. 10.4055/jkoa.2016.51.3.266.

Tibial Schwannoma Mimicking a Popliteal Cyst

Affiliations
  • 1Department of Orthopedic Surgery, Soonchunhyang University Bucheon Hospital, Bucheon, Korea. kdmin@schmc.ac.kr
  • 2Department of Orthopedic Surgery, Sungae Hospital, Seoul, Korea.

Abstract

Schwannoma is the most common benign tumor of peripheral nerves and usually appears on the trunk, head and neck, or extremities. A mass arising at popliteal fossa can be misdiagnosed as a popliteal cyst. We report on a rare case of a popliteal schwannoma mimicking a popliteal cyst in a 39-year-old female who showed a clinical presentation similar to that of a popliteal cyst. Diagnosis was delayed until ultrasonographic evaluation was performed due to its anatomical location, the same as that of a popliteal cyst. We describe the clinical significance and ultrasonographic findings of the schwannoma for initial differential diagnosis from a popliteal cyst.

Keyword

schwannoma; popliteal cyst; ultrasonography
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