Figure 10.

Type 1B tear. (A) Injury one week prior. Proton-density coronal MRI image showing moderately displaced fracture base of ulnar styloid process (short solid arrow). The distal lamina is partially torn (short block arrow) with a complete tear of the proximal lamina (solid arrowhead); (B) frontal radiograph shows fracture of ulnar styloid process (block arrowhead). The TFCC cannot be evaluated radiographically; (C) proton density fat-suppressed coronal MRI image shows avulsion fracture of distal ulnar styloid process (long solid arrow). The distal laminar fibres are intact (long block arrow) though mild increased abnormal signal suggests mild sprain. A complete tear of the proximal lamina fibres (curved solid arrow) is also present. TFCC, triangular fibrocartilage complex.