A bursa at the proximal TFL muscle belly between the muscle and the lateral iliac crest, developing from repetitive compression of the TFL origin in runners and cyclists. It is distinct from the TFL distal bursa near the greater trochanter.
Proximal TFL bursitis is a specific cause of lateral hip pain in endurance athletes, producing pain at the lateral iliac crest level rather than the greater trochanteric level of classic trochanteric bursitis. It is reproduced by direct palpation of the TFL origin at the ASIS and by resisted hip abduction-flexion. Ultrasound identifies the bursa at the iliac crest-TFL interface.
Bursal inflammation at the TFL iliac crest origin producing lateral hip pain 2-3 cm below the ASIS, distinct from greater trochanteric bursitis, managed with injection and hip abductor biomechanical assessment.
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