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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).
