Devoted to diagnostic and interventional spine imaging and therapeutics


C2 Nerve Root on Magnetic Resonance Imaging of Occipital Neuralgia 2014

Category General Spine Minkyung Yi Joon Woo Lee Jin S Yeom Jongyeal Kang Purpose The purpose of this study was to evaluate the feasibility of magnetic resonance imaging (MRI) for C1/2 neural foramen evaluation with a new grading system and to correlate the C1/2 neural foramen grade with occipital neuralgia (ON) Materials & Methods This study was approved by our institutional review board. The requirement for informed consent was waived. Among the registry of 124 patients who underwent C1/2 spinal surgery between July 2004 and May 2012 in our institute, we enrolled 109 patients who had information with regard to ON and a relevant preoperative cervical spine MR image. A total of 218 neural foramina were evaluated with our new C1/2 neural foramen grading system (Grade 0 to 3) using consensus reading by two experienced radiologists who were blinded to the clinical information. The relationship between the C1/2 grading system and ON was assessed using a chi-square test and Fisher’s exact test. Results All C1/2 neural foramina were delineated on T2 parasagittal images. Among 218 C1/2 neural foramina, Grade 0 was found in 51 foramina (23.4%), Grade 1 in 105 (48.2%), Grade 2 in 31 (14.2%), and Grade 3 in 31(14.2%). The Grade 2 group had the most frequent prevalence of ON (41.9%), followed by Grade 3 (32.3%), Grade 0 (29.4%), and Grade 1 (26.7%). However, the relationship between the grade and ON was not statistically relevant. Conclusion C1/2 neural foramina can be depicted on MRI. However, the relationship between the new grading system for C1/2 neural foramina and ON was not statistically relevant. References 1. Bogduk N. The anatomical basis for cervicogenic headache. J Manipulative Physiol Ther. 1992;15(1):67-70. 2. Alix ME, Bates DK. 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