Dorsal Fractures of the Triquetrum: MRI Findings With an Emphasis on Dorsal Carpal Ligament Injuries

作者：Becce Fabio^*; Theumann Nicolas; Bollmann Christof; Omoumi Patrick; Richarme Delphine; Guerini Henri; Campagna Raphael; Meuli Reto; Drape Jean Luc

来源：American Journal of Roentgenology, 2013, 200(3): 608-617.

DOI：10.2214/AJR.12.8736

• carpal ligaments
• fracture
• MRI
• triquetrum
• wrist

OBJECTIVE. The objective of our study was to report the MRI findings in dorsal fractures of the triquetrum, with an emphasis on dorsal carpal ligament injuries. %26lt;br%26gt;MATERIALS AND METHODS. A total of 21 patients (16 men, five women; mean age, 41.9 years) with acute or subacute (%26lt;= 6 weeks) dorsal triquetral fractures on radiography and MRI were included in this two-center retrospective study. MRI of the wrist was performed on 3-T units with transverse T1-weighted, coronal or transverse (or both) fat-suppressed T2-weighted, transverse gadolinium-enhanced fat-suppressed T1-weighted turbo spin-echo, and 3D gadolinium-enhanced fat-suppressed T1-weighted gradient-recalled echo sequences. Three musculoskeletal radiologists evaluated the ulnar styloid process index (USPI) on radiographs and the following MRI features: fracture pattern (types 1-6), bone fragment size and displacement, bone marrow edema distribution, and dorsal carpal ligament tears. %26lt;br%26gt;RESULTS. Eight type 1, one type 2, six type 3, five type 4, and one type 5 fractures were identified. These fractures were associated with 14 (66.7%), 17 (81.0%), and 16 (76.2%) tears of the dorsal radiocarpal, ulnotriquetral, and intercarpal ligaments, respectively. There was no correlation between bone marrow edema distribution and dorsal carpal ligament injuries (all p %26gt; 0.05). The mean (+/- SD) bone fragment volume and displacement were 205 +/- 157 mm(3) and 1.0 +/- 1.1 mm, respectively. The mean USPI was 0.21 +/- 0.10. %26lt;br%26gt;CONCLUSION. Dorsal fractures of the triquetrum are frequently associated with dorsal carpal ligament injuries. Bone marrow edema distribution is not correlated with these ligament tears.

• 出版日期2013-3