Fabella Syndrome as an Uncommon Cause of Posterolateral Knee Pain after Total Knee Arthroplasty: A Case Report and Review of the Literature

Table 1

Previous reports on fabella syndrome after TKA.

Previous report (published year)	Age/sex; M: male; F: female	Onset time after TKA	Symptoms	Movement that causes symptoms	Etiology	Treatment
Jaffe et al.; 1988 [3]	63 F	6 days	Pain located in the posterolateral part of the knee & snapping & clicking	Knee flexion at 90°	The posterior edge of the polyethylene component	Fabellectomy
Laird; 1991 [9]	68 M	3 months	Pain behind the knee & hard lump	During knee flexion & extension	Posterior condyle of the prosthesis	Fabellectomy
Larson and Becker; 1993 [10]	67 F	3 months	Pain localized to the posterolateral aspect of the knee & catching	During knee motion	Moderate mediolateral laxity & polyethylene insert	Changed to a thicker polyethylene & fabellectomy
Erichsen; 1997 [11]	64 F	1 year	Pain in the lateral part of popliteal fossa & clicking	When the knee was extended from full flexion	The edge of the femoral component	Fabellectomy
Segal et al.; 2004 [12]	53 F	8 weeks	Pain at the posterolateral aspect of the popliteal fossa & crepitus	Knee flexion & extension	Lateral edge of the prosthetic femoral condyle	Fabellectomy
Present study	66 F	1 week	Posterolateral knee pain & snapping	Active knee flexion at 80–90°	Lateral edge of the femoral component and femoral condyle	Fabellectomy