WRIST MRI ARTHROGRAM VS WRIST ARTHROSCOPY – WHAT ARE WE FINDING?

Abstract

The aim of the study was to compare the radiological findings of wrist arthrogram with wrist arthroscopy. This allowed us to establish the accuracy (sensitivity, specificity) of MRI arthrogram as a diagnostic tool. Thirty patients (20 female and 10 male) have undergone both wrist MRI arthrogram and wrist arthroscopy over the last 3 years at Macclesfield District General Hospital. The mean age at arthrogram was 42.4 years with an average 6.7 month gap between the two procedures.

The MRI arthrogram was reported by a consultant radiologist with an interest in musculoskeletal imaging and the arthrosopies performed by two upper limb surgeons. Patients undergoing both procedures were identified. The arthrogram reports and operation notes were examined for correlation. Three main areas of pathology were consistently examined: TFCC (triangular fibrocartilage complex), scapholunate and lunatotriquetral ligament tears. The sensitivity and specificity of arthrogram was calculated for each. Other areas of pathology were also noted.

In the case of TFCC tears MRI arthrogram had a 92.3% sensitivity and 54.6% specificity. The lunatotriquetral ligament examination with this technique was 100% sensitivity and specificity. However for scapholunate ligament tears it only had 50% sensitivity and 77.8% specificity.

Wrist arthrogram and arthroscopy are both invasive techniques and equally time consuming. In cost terms the arthrogram remains cheaper but is superseded by arthroscopy as it is both diagnostic and therapeutic.