Mohamed M Aly1,2, Abdulbaset M Al-Shoaibi3, Saleh Abduraba3, Ahmed J Alzahrani4, Hany Eldawoody5,6. 1. Department of Neurosurgery, Prince Mohammed Bin Abdulaziz Hospital, P.O Box 54146, 11514, Riyadh, Saudi Arabia. drmoali26@gmail.com. 2. Department of Neurosurgery, Mansoura University, Mansoura, Egypt. drmoali26@gmail.com. 3. Department of Diagnostic Radiology, Prince Mohammed Bin Abdulaziz Hospital, Riyadh, Saudi Arabia. 4. Department of Neurosurgery, Security Forces Hospital, Riyadh, Saudi Arabia. 5. Department of Neurosurgery, Prince Mohammed Bin Abdulaziz Hospital, P.O Box 54146, 11514, Riyadh, Saudi Arabia. 6. Department of Neurosurgery, Mansoura University, Mansoura, Egypt.
Abstract
PURPOSE: To determine the impact of magnetic resonance imaging (MRI) on fracture classification for low lumbar fractures (LLFs) compared to CT alone. METHODS: This study was a retrospective review of 41 consecutive patients with LLFs who underwent CT and MRI within 10 days of injury. Three reviewers classified all fractures according to AOSpine Classification and the Thoracolumbar Injury Classification (TLISS). Posterior ligamentous complex (PLC) injury in MRI was defined by black stripe discontinuity and in CT by the presence of: vertebral body translation, facet joint malalignment, horizontal laminar or spinous process fracture, and interspinous widening. The proportion of patients with AO type A/B/C and with TLISS < 5 and ≥ 5 was compared between CT and MRI. We examined the overall accuracy and individual CT findings for PLC injury. RESULTS: AO classification using CT was: AO type A in 26 patients (61%), type B in 7 patients (17%), and type C in 8 patients (22%). Seventeen patients (41%) had a TLISS ≥ 5 while 24 (59%) had TLISS < 5. The addition of MRI after CT changed the AO classification in only 2 patients (4.9%, 95% CI (0.6-16.5%) due to upgrade of type A to type B or vice versa, but did not change TLISS from < 5 to ≥ 5 [p< 0.0001; 95% CI (0.59, 0.77)]. CONCLUSIONS: CT was highly accurate (95%) for diagnosis of PLC injury in LLFs. Addition of MRI after CT did not change the AO classification or TLISS, compared to CT alone, thus suggesting limited additional value of MRI for PLC assessment or fracture classification.
PURPOSE: To determine the impact of magnetic resonance imaging (MRI) on fracture classification for low lumbar fractures (LLFs) compared to CT alone. METHODS: This study was a retrospective review of 41 consecutive patients with LLFs who underwent CT and MRI within 10 days of injury. Three reviewers classified all fractures according to AOSpine Classification and the Thoracolumbar Injury Classification (TLISS). Posterior ligamentous complex (PLC) injury in MRI was defined by black stripe discontinuity and in CT by the presence of: vertebral body translation, facet joint malalignment, horizontal laminar or spinous process fracture, and interspinous widening. The proportion of patients with AO type A/B/C and with TLISS < 5 and ≥ 5 was compared between CT and MRI. We examined the overall accuracy and individual CT findings for PLC injury. RESULTS: AO classification using CT was: AO type A in 26 patients (61%), type B in 7 patients (17%), and type C in 8 patients (22%). Seventeen patients (41%) had a TLISS ≥ 5 while 24 (59%) had TLISS < 5. The addition of MRI after CT changed the AO classification in only 2 patients (4.9%, 95% CI (0.6-16.5%) due to upgrade of type A to type B or vice versa, but did not change TLISS from < 5 to ≥ 5 [p< 0.0001; 95% CI (0.59, 0.77)]. CONCLUSIONS: CT was highly accurate (95%) for diagnosis of PLC injury in LLFs. Addition of MRI after CT did not change the AO classification or TLISS, compared to CT alone, thus suggesting limited additional value of MRI for PLC assessment or fracture classification.
Authors: Joon Y Lee; Alexander R Vaccaro; Karl M Schweitzer; Moe R Lim; Eli M Baron; Raja Rampersaud; F C Oner; R John Hulbert; Rune Hedlund; Michael G Fehlings; Paul Arnold; James Harrop; Christopher M Bono; Paul A Anderson; Alpesh Patel; D Greg Anderson; Mitchel B Harris Journal: Spine J Date: 2007-01-24 Impact factor: 4.166
Authors: M Reinhold; C Knop; R Beisse; L Audigé; F Kandziora; A Pizanis; R Pranzl; E Gercek; M Schultheiss; A Weckbach; V Bühren; M Blauth Journal: Eur Spine J Date: 2010-05-25 Impact factor: 3.134
Authors: Bharti Khurana; Luciano M Prevedello; Christopher M Bono; Erwin Lin; Steven T McCormack; Hamdi Jimale; Mitchel B Harris; Aaron D Sodickson Journal: Eur Spine J Date: 2018-08-03 Impact factor: 3.134
Authors: Joon Y Lee; Alexander R Vaccaro; Moe R Lim; F C Oner; R John Hulbert; Rune Hedlund; Michael G Fehlings; Paul Arnold; James Harrop; Christopher M Bono; Paul A Anderson; D Greg Anderson; Mitchel B Harris; Andrew K Brown; Gordon H Stock; Eli M Baron Journal: J Orthop Sci Date: 2005-11 Impact factor: 1.601