UCSD Musculoskeletal Radiology

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MSK Classifications

Palmer classification for triangular fibrocartilage complex abnormalities

 
Class 1: Traumatic
A - Central perforation
B - Ulnar avulsion
C - Distal avulsion
D - Radial avulsion with or without sigmoid notch fracture

 

Class 2: Degenerative (ulnocarpal abutment syndrome) stage
A - TFCC wear
B - TFCC wear with lunate and/or ulnar chondromalacia
C - TFCC perforation with lunate and/or ulnar chondromalacia
D - TFCC perforation with lunate and/or ulnar chondromalacia and LT ligament perforation
E - TFCC perforation with lunate and/or ulnar chondromalacia, LT ligament perforation, and ulnocarpal arthritis