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Fig. 4. —38-year-old male patient who suffered forced external rotation and abduction injury to left arm while trying to stop a rifle from falling. Longitudinal extended-field-of-view sonogram of sternal head of pectoralis major muscle (P) under active contraction shows grade 3 tear at distal myotendon with intervening hematoma (asterisks). Distal tendon (arrowheads) is heterogeneous but intact, inserting into humerus (H) deep to overlying deltoid (D).