"a: central perforation of the triangular fibrocartilage (TFC) disc proper"
"b: ulnar avulsion with or without distal ulnar fracturemay involve the proximal or distal lamina (foveal and styloid attachment, respectively), or both"
"c: distal avulsion of the TFCC involving ulnotriquetral and ulnolunate ligaments"
"d: radial avulsion of the TFC disc proper +/- sigmoid notch fracture"
"a: TFCC wear with thinning/fraying without perforation"
"b: TFCC wear in 2a with lunate, triquetral and/or ulnar chondromalacia"
"c: TFCC perforation +/- 2b chondromalacia"
"d: lunotriquetral ligament perforation +/ features of 2a, 2b and/or 2c"
"e: any or all of above with ulnocarpal arthritis"
"a: central perforation of the triangular fibrocartilage (TFC) disc proper"
"b: ulnar avulsion with or without distal ulnar fracturemay involve the proximal or distal lamina (foveal and styloid attachment, respectively), or both"
"c: distal avulsion of the TFCC involving ulnotriquetral and ulnolunate ligaments"
"d: radial avulsion of the TFC disc proper +/- sigmoid notch fracture"
"a: TFCC wear with thinning/fraying without perforation"
"b: TFCC wear in 2a with lunate, triquetral and/or ulnar chondromalacia"
"c: TFCC perforation +/- 2b chondromalacia"
"d: lunotriquetral ligament perforation +/ features of 2a, 2b and/or 2c"
"e: any or all of above with ulnocarpal arthritis"
Expected headings
"Class 1 - traumatic injury"
"Class 2 - degenerative injury (ulnocarpal abutment syndrome)"