Asymmetrical degenerative marrow (Modic) changes in cervical spine: prevalence, correlative factors, and surgical outcomes

Table 1 Miyazaki classification and Matsumoto’s classification

Miyazaki classification
Grade	Nucleus signal intensity	Nucleus structure	Distinction of nucleus and annulus	Disc height
I	Hyperintense	Homogenous, white	Clear	Normal
II	Hyperintense	Inhomogenous with horizontal band, white	Clear	Normal
III	Intermediate	Inhomogenous, gray to black	Unclear	Normal to decreased
IV	Hypointense	Inhomogenous, gray to black	Lost	Normal to decreased
V	Hypointense	Inhomogenous, gray to black	Lost	Collapsed
Matsumoto’s classification
Grade
I	Disc bulging beyond the posterior margin of the vertebral body
II	Disc bulging over half of epidural space
III	Disc protrusion bordering the spinal cord
IV	Disc protrusion compressing the spinal cord

ISSN: 1749-799X