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Normal Anatomy and Strains of the Deep Musculotendinous Junction of the Proximal Rectus Femoris: MRI Features

¹ Department of Radiology, Beth Israel Medical Center, First Ave. at 16th St., New York, NY 10003.
² Department of Radiology, NYU Hospital for Joint Diseases, New York, NY 10003.

OBJECTIVE. The MRI features of the proximal rectus femoris musculotendinous junction have scarcely been described in the literature. The purpose of our study, based on a review of 50 asymptomatic and 20 symptomatic MRI studies, was to define the normal MRI anatomy and MRI features of intrasubstance injury of deep musculotendinous tears of the proximal rectus femoris.

CONCLUSION. Axial and coronal MR images are optimal for visualizing the direct and indirect heads, the conjoined tendon, and the deep musculotendinous junction of the proximal rectus femoris. Tears of the deep musculotendinous junction are longitudinal, involving a long segment of the muscle. MRI features include a "bull's-eye" sign, longitudinal scar, retraction, pseudocyst, and hematoma.

Keywords: hip • MRI • musculotendinous junction injuries • rectus femoris • sports medicine • trauma

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