title: Musculoskeletal Sonography for Evaluation of Anatomic Variations of Extensor Tendon Synovial Sheaths in the Wrist.
abstract: OBJECTIVE
  The purpose of this article is to show the anatomic variations of extensor tendon synovial sheaths in the wrist.
  
  
  METHODS
  Videos from 157 patients that were available in the electronic database were reviewed. Sonography showed involvement of 186 tendon sheaths.
  
  
  RESULTS
  We describe our center's experience with most tendon variants described in the literature and show the sonographic appearance of the most frequent ones.
  
  
  CONCLUSIONS
  Sonography is an accepted, safe, and efficient method for evaluating conditions characterized by effusion into the synovial sheaths of the wrist extensor tendons. Knowledge of anatomy and anatomic abnormalities of these sheaths is essential for diagnosis and for correct ultrasound-guided injection therapy or, less frequently, planning a surgical approach.
authors.affiliation: Istituto Di Ricovero e Cura a Carattere Scientifico Foundation, San Matteo Medical Center, Institute of Radiology, University of Pavia, Pavia, Italy.
authors.forename: Ferdinando
authors.initials: F
authors.lastname: Draghi
authors.affiliation: Istituto Di Ricovero e Cura a Carattere Scientifico Foundation, San Matteo Medical Center, Institute of Radiology, University of Pavia, Pavia, Italy. chandra.bortolotto@gmail.com.
authors.forename: Chandra
authors.initials: C
authors.lastname: Bortolotto
authors.affiliation: Istituto Di Ricovero e Cura a Carattere Scientifico Foundation, San Matteo Medical Center, Institute of Radiology, University of Pavia, Pavia, Italy.
authors.forename: Anna Guja
authors.initials: AG
authors.lastname: Draghi
authors.affiliation: Istituto Di Ricovero e Cura a Carattere Scientifico Foundation, San Matteo Medical Center, Institute of Radiology, University of Pavia, Pavia, Italy.
authors.forename: Bettina
authors.initials: B
authors.lastname: Gregoli
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013583:Synovial Membrane / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D013710:Tendons / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000379:methods*; D014953:Wrist / Q000002:abnormalities* / Q000000981:diagnostic imaging; D055815:Young Adult
keywords: anatomic variation; extensor tendons; musculoskeletal ultrasound; sonography; synovial sheaths; wrist