A bursa at the ischial tuberosity where the proximal hamstring tendons (semitendinosus, semimembranosus, and biceps femoris long head) originate, reducing friction between the conjoined tendon and the ischial bone. It is distinct from the ischial bursa of the adductor magnus.
Proximal hamstring origin bursitis (high hamstring tendinopathy bursitis) is common in runners and produces deep buttock pain at the ischial tuberosity worsened by sitting and sprinting. MRI demonstrates bursal fluid and peritendinous signal change at the ischial origin. Ultrasound-guided injection at the proximal hamstring origin distinguishes bursitis from pure tendinopathy. Platelet-rich plasma and progressive loading are the primary treatments.
Bursal inflammation at the ischial tuberosity hamstring attachment producing deep buttock pain worsened by sitting and running, confirmed by MRI and managed with ultrasound-guided injection and eccentric loading rehabilitation.
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