Hirai T, Yoshii T, Inose H, et al. - In this prospective observational single-center study, 87 people were recruited who underwent surgery for treatment of cervical spondylotic myelopathy (CSM) between 2011 and 2015 at a hospital and who could be followed up for at least 2 years in order to assess anterior decompression and fusion (ADF, n = 26) or posterior surgery (PS, n = 61) for individuals with CSM using the modified K-line (mK-line) and to contrast clinical and radiologic outcomes between these two techniques. In the PS group, ten people underwent posterior decompression with fusion. Nonetheless, in comparison with individuals with a minimum interval of the spinal cord > 4 mm in the PS group, individuals with a minimum interval between the mK-line and the anterior compression factor on the midsagittal image (minimum interval of the spinal cord) < 4 mm supposed to have unsatisfactory outcomes. Thus, in both anterior surgery and PS, to prognosticate residual cord compression, preoperative intervention using the mK-line is beneficial and it may homogenize postoperative clinical outcomes.