Each MR arthrographic examination included sequences in all three planes. MR arthrograms were obtained after instillation of dilute gadolinium contrast medium into one or more of the midcarpal, radiocarpal, and distal radioulnar joint compartments. Radioscaphocapitate and long radiolunate tears seen at MRI and at arthroscopic examination were recorded. Although no consistent differences in image quality were apparent empirically, the heterogeneity in acquisition techniques, protocols, and MRI systems used to obtain the images is another limitation of our study.
Radioscaphocapitate and long radiolunate tears seen at MRI and at arthroscopic examination were recorded. Hip Anatomic Variants That May Mimic Abnormalities at MRI: Labral Variants. The arthroscopic surgeon was not blinded to the results of MRI before performing arthroscopy, but in only four cases did the formal MRI report describe the status of the radioscaphocapitate and long radiolunate ligaments.Examination of the MR images was performed by a musculoskeletal fellowship-trained radiologist with 2 years of experience in interpreting MR arthrograms of the wrist. No bone marrow edema or fracture apart from minimal edema in the distal aspect of the scaphoid. The radioscaphocapitate ligament is easily seen on MRI. Imaging of Anterior Cruciate Ligament Repair and Its Complications,Original Research.
Since the first description of the extrinsic ligaments of the wrist, their functions have continued to be defined. The surgical log of the primary investigator, who had more than 20 years of experience in wrist arthroscopy, was examined for the records of all patients who had undergone either diagnostic or therapeutic wrist arthroscopy from 2003 to 2009. Two cases were excluded from analysis because documentation of the radioscaphocapitate and long radiolunate ligament findings at arthroscopy was incomplete. For the studies performed with the 1.5-T system, the following parameters were used: FOV, 8–11 cm,A tear of the radioscaphocapitate or long radiolunate ligament was diagnosed at MR arthrography if any of the following observations was made: focal high signal intensity extending through at least a portion of the cross-section of the ligament on fluid-sensitive or fat-suppressed T1-weighted images, abnormal morphologic features of the ligament (fraying, irregularity, indistinctness of ligament fibers) on any image, or abnormal caliber of the ligament on any image [,The hand surgeon who performed arthroscopy reviewed the operative reports and arthroscopic photographs for each of the 26 patients. It overlies the waist of the scaphoid (maintaining the position of the scaphoid as it acts like a seat belt). These results were recorded in both dictated operative reports and annotated intraoperative photographs of the arthroscopic procedure. 4, Fig. [,With the recognition of the importance of the radioscaphocapitate and long radiolunate ligaments (.Institutional review board approval was obtained for this HIPAA-compliant retrospectively designed study. Long radiolunate ligament tears were diagnosed in 31% (8/26) of cases at MR arthrography and in 31% (8/26) of cases at arthroscopy. With arthroscopy as the reference standard, the sensitivity of MR arthrography for detection of radioscaphocapitate ligament tear was 63% (5/8), and the specificity was 56% (10/18). The radial collateral ligament (RCL), or radioscaphoid ligament, runs from the radial styloid process to the scaphoid tuberosity and the flexor carpi radialis tendon ( Fig. Arthroscopy was used as the reference standard for this purpose. Flexion of the scaphoid and extension of the lunate with the proximal scaphoid subluxed dorsally relative to the distal radius in keeping with rotary subluxation of the scaphoid.
The specific MRI parameters used varied, but a wrist coil was used to obtain each image. [,Although we believe that intraarticular contrast administration should optimize visualization and evaluation of the extrinsic ligaments, the small number of patients in our study precludes assessment of the potential superiority of MR arthrography for this purpose. High-Resolution 3-T MRI of the Fingers: Review of Anatomy and Common Tendon and Ligament Injuries,Pictorial Essay. It is sometimes considered part of the RSL rather than a separate structure. Ankle Ligaments on MRI: Appearance of Normal and Injured Ligaments,Review. Our study did not show a reliable correlation between MR arthrographic and wrist arthroscopic findings in evaluation of the radioscaphocapitate and long radiolunate ligaments. There is mild negative ulnar variance with compensatory thickening of the triangular fibrocartilage, the head of the styloid process is mildly deformed probably related to a past injury and there is scarring at the radial attachment of the triangular fibrocartilage.
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