Is tfcc a injury to the ligaments or to the cartilage?

Cartilage: The CC in TFCC stand for cartilagenous complex, although when you injure the TFCC you can injure ligaments in the wrist as well.

Cartilage: however that does not preclud an additiional ligament injury

TFCC is both: It is a carticalginous strucutre that blends into ligmants. That is why it has "fibro" like a ligament. "cartilage" and COMPLEX in its name. THe central disc part is cartilage that cushions but it has a thickened vascular rim that provdde ligamenteouis like structure, the ulnar ligmanets of hte wrsit and the tendin sheath of the ecu blend into this. Think of a sail with supports, rigging