Table 1.

Palmer Classification of TFCC tear.

TYPE 1	TRAUMATIC
1A	Isolated central TFCC articular disk perforation
1B	Peripheral ulnar-sided TFCC tear (with or without ulnar styloid fracture)
1C	Distal TFCC disruption
1D	Radial TFCC disruption
TYPE 2	DEGENERATIVE
2A	TFCC wear
2B	TFCC wear with lunate and/or ulnar chondromalacia
2C	TFCC perforation with lunate and/or ulnar chondromalacia
2D	TFCC perforation with lunate and/or ulnar chondromalacia and with lunotriqetral ligament perforation
2E	TFCC perforation with lunate and/or ulnar chondromalacia, lunotriquetral ligament perforation and ulnocarpal arthritis