Extensor retinaculum of the wrist: sonographic characterization and pseudotenosynovitis appearance.
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.
Robertson
Brian L
BL
Department of Radiology, University of Michigan Hospitals, 1500 E Medical Center Dr., TC2910, Ann Arbor, MI 48109, USA.
Jamadar
David A
DA
Jacobson
Jon A
JA
Kalume-Brigido
Monica
M
Caoili
Elaine M
EM
Margaliot
Zvi
Z
De Maeseneer
Michel O
MO
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*