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Table 8 Frequency of ASD according to Pfirmann and Metzdorf scale in patients with multilevel spine fixation

From: Early developed ASD (adjacent segmental disease) in patients after surgical treatment of the spine due to cancer metastases

  4-level 5-level 6-level 7-level 8-level 9-level
Pfirmann and Metzdorf
 Grade 1 9 17 37 51 16 18
 Grade 2 2 1 7 3 1 1
 Grade 3   1 2 4 2 1
 Grade 4   1 3 1 1 1
 Grade 5   1 1 1 3 1
 Others 1   2 2 1 1