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A symptomatic cyamella in the popliteus tendon causing snapping knee: a case report and literature review

Shouwen Su¹, Yunxiang Lu¹, Yuxian Chen¹

¹Department of Orthopedics, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China.

BMC Musculoskeletal Disorders

|October 29, 2019

Abstract

Background:

Cyamella,the sesamoid bones of the popliteus muscle, are rare in humans. Snapping knee is an uncommon problem which can be difficult to diagnose.

Case Presentation:

In this case, we report a 24-year-old male with snapping knee caused by symptomatic cyamella in the popliteus tendon. A large cyamella was identified upon surgery and was removed. Postoperatively, the patient had immediate relief of preoperative symptoms, and there were no signs of recurrence after 1 years of follow-up.

Conclusions:

Although not previously suggested, symptomatic cyamella in the popliteus tendon should be considered as part of the differential diagnosis of the snapping knee.

Keywords:

Cyamella Knee joint Popliteus Sesamoid Snapping knee Surgery

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