TFCC is a complex structure at the ulnar sided wrist joint composed of multiple components. It plays a vital role in distal radioulnar and ulnocarpal joints stability where palmar and dorsal radioulnar ligaments are regarded as the major factors [1-4]. A 3.0 T wrist MRA with a special 3D isotropic proton density-weighted fat-suppressed sequence has been used and reported to have better results [5-10, 13]. Palmer classification is widely used for TFCC injury which includes traumatic (class 1 injuries): 1A (central perforation), 1B (ulnar avulsion),...

Total of 235 patients with wrist pain (age range 13 to 90 years; mean age 49.0) were evaluated retrospectively in this study after institutional review board approval. All MRI images were obtained using an eight-channel wrist coil on a 3.0 T unit (Achiva TX, Philips Healthcare, Best, Netherlands). Axial 2D FSE PDWI (2mm thickness) and reformatted images from coronal 3D isotropic FS PDWI (0.35 mm voxel size) were reviewed for evaluation of this study. A parallel imaging technique named sensitivity encoding (SENSE) was used in...

One hundred forty-four cases were diagnosed TFCC injury. In this study, Palmer 1B (n=113), UC (n=98) and 1A (n=85) were more common injuries (Table 1). Most of TFCC injuries were more than one component lesions (81% > 1, average 3.2). Majority of those were 4 component injuries (n=32) followed by 1 component (n=27) and 2 components (n=24) injuries (Fig. 5). ECU tendon/sheath injuries (n=83) were related to 1B (n=76) and UC (n=73) injuries, and frequently associated with DRUL more than VRUL (46 vs 13) injuries...

TFCC injury more often involves multiple components. There are some specific patterns and distributions of TFCC injury. Ulnar TFCC component such as Palmer 1B and ulnar capsule/ulnar collateral ligament are more common TFCC injuries than radial component injury such as 1D. Higher number of multiple component injuries are associated with distal TFCC injury such as 1C and meniscus homologue involvement. ECU tendon/sheath injuries are more frequently seen with dorsal wrist injury including DRUL. Comprehensive component analysis would be useful to understand mechanism of TFCC injury...

Y. R. Bhandari; Singapore/SG - nothing to disclose Current affiliation: Department of Radiology, B & B Hospital Pvt Ltd Gwarko, Lalitpur, Nepal. PO Box 2481 Phone: +977-1-5531933 E-mail: [email protected] Q. S. Tian; Singapore/SG - nothing to disclose S. Horiuchi; California/US - nothing to disclose H. Yoshioka; Orange, CA/US - nothing to disclose

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