title: Extensor retinaculum of the wrist: sonographic characterization and pseudotenosynovitis appearance.
abstract: OBJECTIVE
  We have found in our practice that the normal extensor retinaculum of the wrist may appear hypoechoic on sonography and, because it is closely applied to the extensor tendons, may simulate tenosynovitis. This study prospectively evaluates the extensor retinaculum in 50 healthy adult volunteers, characterizing its sonographic appearance.
  
  
  CONCLUSIONS
  The extensor retinaculum has a characteristic appearance on sonography. A hypoechoic appearance from anisotropy should not be confused with tenosynovitis.
authors.affiliation: Department of Radiology, University of Michigan Hospitals, 1500 E Medical Center Dr., TC2910, Ann Arbor, MI 48109, USA.
authors.forename: Brian L
authors.initials: BL
authors.lastname: Robertson
authors.forename: David A
authors.initials: DA
authors.lastname: Jamadar
authors.forename: Jon A
authors.initials: JA
authors.lastname: Jacobson
authors.forename: Monica
authors.initials: M
authors.lastname: Kalume-Brigido
authors.forename: Elaine M
authors.initials: EM
authors.lastname: Caoili
authors.forename: Zvi
authors.initials: Z
authors.lastname: Margaliot
authors.forename: Michel O
authors.initials: MO
authors.lastname: De Maeseneer
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D003951:Diagnostic Errors / Q000517:prevention & control*; D005189:False Positive Reactions; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013717:Tenosynovitis / Q000000981:diagnostic imaging*; D014463:Ultrasonography; D014955:Wrist Joint / Q000000981:diagnostic imaging*