title: Normal anatomy and strains of the deep musculotendinous junction of the proximal rectus femoris: MRI features.
abstract: 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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Radiology, Beth Israel Medical Center, First Ave. at 16th St., New York, NY 10003, USA. soterios20@gmail.com
authors.forename: Soterios
authors.initials: S
authors.lastname: Gyftopoulos
authors.forename: Zehava Sadka
authors.initials: ZS
authors.lastname: Rosenberg
authors.forename: Mark E
authors.initials: ME
authors.lastname: Schweitzer
authors.forename: Marcelo
authors.initials: M
authors.lastname: Bordalo-Rodrigues
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002648:Child; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D052097:Quadriceps Muscle / Q000293:injuries* / Q000473:pathology; D013180:Sprains and Strains / Q000473:pathology* / Q000628:therapy; D013708:Tendon Injuries / Q000473:pathology* / Q000628:therapy