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. 2012 Jan 23;14(1):R17. doi: 10.1186/ar3696

Table 3.

Histologic evaluation parameters for the intervertebral disc

Parameters Grade Description
Clefts in the NP 0 Absent
1 Rarely present
2 Intermediately present
3 Abundantly present
Tears in AF 0 Absent
1 Rarely present
2 Intermediately present
3 Abundantly present
Granular changes 0 Absent
1 Rarely present
2 Intermediately present
3 Abundantly present
Mucous degeneration 0 Absent
1 Rarely present
2 Intermediately present
3 Abundantly present
Cell clustering 0 No proliferation
1 Mild
2 Moderate
3 Severe