A small bursa located between the pectineus muscle and the anterior hip capsule or iliopsoas tendon. It occasionally communicates with the iliopsoas bursa and contributes to anterior groin pain syndromes.
Pectineus bursitis is an uncommon cause of deep groin pain reproduced by resisted hip flexion with adduction. It may be identified on ultrasound or MRI as a discrete fluid collection anterior to the hip joint. Hip arthroscopy has occasionally revealed communication with the joint space.
Inflammation between the pectineus and anterior hip capsule presenting as anterior groin pain with hip flexion and adduction, sometimes mimicking a labral tear.
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