30-year-old female patient with wrist pain. Evaluate for radioscaphoid arthrosis. There is enlargement of the membranous portion of the scapholunate ligament with increased signal intensity that likely represents mucinous degeneration and probable partial-thickness tearing. The dorsal and volar components of the scapholunate ligament appear intact. There is also lobular abnormal signal intensity within the adjacent proximal portion of the scaphoid, likely representing mucinous extension into the bone (intraosseous ganglion). This was not present on the prior examination. There is a defect in the distal radial articular surface, measuring 5 x 7 mm an area and approximately 1 mm in depth. This defect is immediately proximal to the abnormal scapholunate ligament and was also not present on the prior MRI exam. We are uncertain if this defect is due to prior trauma or represents a shallow erosion related to the aforementioned abnormal scapholunate ligament. The remaining articular cartilage of the distal radius is intact, including that of the radioscaphoid articulation. The lunotriquetral ligament is not well visualized on this study, but this is often the case on non-arthrogram MRI examinations. The remainder of the bones appear normal. We suspect that there is a partial-thickness tear of the proximal surface fibers of the articular disc of the triangular fibrocartilage that extends into the volar radioulnar ligament. This can be further evaluated with dedicated MRI arthrogram, if clinically warranted. The tendons and visualized muscles appear normal as do the visualized nerves.
1.Enlargement of the membranous portion of the scapholunate ligament likely represents mucinous degeneration with adjacent ganglion formation in the proximal pole of the scaphoid.2.Articular surface defect in the distal radius just proximal to the abnormal portion of the scapholunate ligament may represent additional erosion or may be due to old trauma. 3.Other findings as described above.