Dynamic cervical radiographs in patients with Hirayama disease: an unneglectable factor on the choice of surgery options.

Dynamic cervical radiographs in patients with Hirayama disease: an unneglectable factor on the choice of surgery options.

World Neurosurg. 2018 Mar 09;:

Authors: Wang H, Sun C, Yang S, Jiang J, Lu F, Ma X, Xia X

Abstract
OBJECTIVE: To evaluate the cervical spine alignment and range of motion (ROM) of neck flexion in patients with Hirayama disease (HD).
METHODS: A total of 50 male patients were included, with dynamic radiographs and MRI analyzed retrospectively. The Cobb angles for the entire cervical spine (C2-7) and each level (C2/3-C6/7) were measured, and the neck flexion ROM was defined as the neutral Cobb angle minus the flexion Cobb angle. Paired t-tests and Wilcoxon's sign rank tests were used to compare the Cobb angles and ROM between radiographs and MRI.
RESULTS: The neutral and flexion Cobb angles decreased from C2/3 to C5/6 but increased at C6/7 on both radiographs and MRI. The neutral Cobb angle of C2-7 from radiographs was significantly larger than that seen with MRI (5.27° vs. -3.26°, P<0.0001). Neck flexion ROM seen with MRI tended to be lower than those of corresponding levels on radiographs. The ROM of C2-7, C3/4 and C6/7 on radiographs was significantly larger than that seen with MRI (37.86° vs. 26.59°, P<0.0001; 7.46° vs. 5.10°, P=0.0071 and 10.45° vs. 7.03°, P=0.0023, respectively). For the lower cervical levels, the largest and second largest ROM were seen in C5/6 and C6/7 on the radiographs but C5/6 and C4/5 with MRI.
CONCLUSIONS: The cervical spine alignment and neck flexion ROM in HD differed between radiographs and MRI. Both of these imaging techniques should be examined comprehensively when planning an operation.

PMID: 29530702 [PubMed - as supplied by publisher]

http://ift.tt/2FC5Pl2