Abstract
There is a difference of opinion regarding the usefulness of MR Imaging as a diagnostic tool for triangular fibrocartilage complex (TFCC) tears in the wrist. Our aim was to determine the accuracy of direct magnetic resonance arthrography (MRA) in the diagnosis of triangular fibrocartilage complex (TFCC) tears of the wrist in a district general hospital setting.
In a retrospective review of 21 patients who presented with complains of wrist pain and following a clinical examination, all had direct MR arthrography of the wrist in our hospital in a 1.5Tesla scanner. All had a diagnostic arthroscopy within 2-4 months of the MR scan. All patients had chronic ulnar sided wrist pain, although only two had a definite history of trauma. The findings of each diagnostic method were compared, with arthroscopy considered the gold standard.
Twenty-one patients were studied (10 male: 11 female), mean age 42 years (range 27-71) years). Seventeen TFCC tears were diagnosed on arthroscopy. For the diagnosis of TFCC tears MRA had a sensitivity, specificity and accuracy of 67%.
Our results echoed the opinion of some of the previous investigators with an unacceptable sensitivity or specificity for a diagnostic tool. MR arthrography needs to be further refined as a technique before it can be considered to be accurate enough to replace wrist arthroscopy for the diagnosis of TFCC tears. Other centres have reported better accuracy, using more advanced MRI technology. Until this iswidely available at all levels of healthcare the results of MRI for the diagnosis of TFCC tears should be interpreted with caution.
