Triangular fibrocartilage complex

Dr Henry Knipe et al.

The triangular fibrocartilage complex (TFCC) is a complex structure that is a major contributor to the stability of the wrist

The TFCC is located on the ulnar aspect of the wrist joint between the ulna and the lunate and triquetrum of the proximal carpal row. It has an elongated triangular shape with the apex pointing at the radius 5 and consists of the triangular fibrocartilage disc proper along with 1, 2:

  • central and radial portions of the TFCC are avascular

The shape of the TFCC varies with negative and positive ulnar variance 4:

Function of the TFCC 3:

  • main stabilizer of distal radioulnar joint (DRUJ)
  • buttress to support proximal carpal row
  • allowing for transmission of a portion of axial load from the carpus to the ulna (~20% of the force, with the remaining 80% through the radiocarpal joint)
Anatomy: Upper limb
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Article information

rID: 24686
Section: Anatomy
Tag: wrist
Synonyms or Alternate Spellings:
  • TFCC
  • Triangular fibrocartilage complex (TFCC)

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Cases and figures

  • Figure 1: ulnomeniscal homologue
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  • Figure 2: axial anatomy diagram
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