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Case Reports
. 2021 Sep 2:2021:7621844.
doi: 10.1155/2021/7621844. eCollection 2021.

Fabella Syndrome and Common Peroneal Neuropathy following Total Knee Arthroplasty

Connor C Diaz  1 , Avinesh Agarwalla  2 , Brian Forsythe  1
Affiliations
Case Reports

Fabella Syndrome and Common Peroneal Neuropathy following Total Knee Arthroplasty

Connor C Diaz et al. Case Rep Orthop. .

Abstract

Case: A 62-year-old man presented with persistent lateral knee pain 15 months following an uncomplicated total knee arthroplasty. There was a tendinous snapping structure over the lateral aspect of the knee in deep flexion with positive Tinel's sign over the fibular head. The patient underwent an uncomplicated flabella excision. The patient was cleared to return to work and full duty at two months postoperatively.

Conclusion: Flabella syndrome is a rare but increasingly common mechanism of persistent lateral knee pain following total knee arthroplasty. Surgeons should be aware of this etiology of persistent lateral knee pain and offer treatment modalities to address this pathology.

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Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Intraoperative fluoroscopy. (a) Fabella before excision. (b) Knee after excision.
Figure 2
Figure 2
Bifid common peroneal nerve.
Figure 3
Figure 3
Lateral gastrocnemius tendon exposure.
Figure 4
Figure 4
Fabella exposure with Allis forceps.
Figure 5
Figure 5
Fabella removal with Allis forceps.
Figure 6
Figure 6
Fabella sizing (1.5 cm × 1 cm × 1 cm).
See this image and copyright information in PMC

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References

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