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A‐D, Computed tomographic (CT) images depicting grades of degenerative joint disease of the articular process joints. A, Normal (grade 0) articular process joint at C6‐C7 in Case 46; B, grade 1 articular process joint change at C3‐C4 in case 47; C, right sided grade 2 change to the articular process joint of C4‐C5 in case 14; and D, bilateral grade 3 change of the articular process joints with intervertebral foraminae obliteration of C6‐C7 in case 40
