| n (%) |
Spine degenerative diseases Spinal trauma Brain tumors Subdural hematoma Scalp tumors Brain trauma Hydrocephalus Epidural hematoma Parenchymal hematoma Spinal malformations Infectious deseases Hardware removal | 24 (40) 11 (18.3) 6 (10) 5 (8.2) 4 (6.7) 3 (5) 2 (3.3) 1 (1.7) 1 (1.7) 1 (1.7) 1 (1.7) 1 (1.7) |