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(A) US in the longitudinal plane of the costal cartilage. Disruption of the cartilage (crossed arrow) is demonstrated with overlying hematoma (asterisk). (B) US of a normal costal cartilage in the longitudinal plane. The osseous portion of the rib ends at the costochondral junction (solid arrow). The rectus abdominus muscle (RA) is seen medially and the external oblique muscle (EO) is seen laterally.
