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(A) Platelet-rich plasma (PRP) was injected into the supraspinatus tendon tear site. The blue arrow indicates a partial tear of the supraspinatus tendon; the red dot indicates the needle tip. (B) A corticosteroid was injected into the subacromial bursa. The blue arrows indicate partial tears of the supraspinatus tendon; the red dot indicates the needle tip.
