Radiological characteristics of CM-1 patients with and without syringomyelia.
| Radiological characteristics and surgical intervention | With syringomyelia | Without syringomyelia | Total (n=59) | P-value |
|---|---|---|---|---|
| n (%) | ||||
| Hydrocephalus | 6 (32) | 7 (18) | 13 (22.03) | 0.223 |
| CVJ + | 19 (100) | 32 (80) | 51 (86.44) | 0.045 |
| CVJ - | 0 (0.00) | 8 (20.00) | 8 (13.56) | |
| length of supraocciput* | 39.1 (7.10) | 39.8 (6.90) | 39.6 (6.45) | |
| Twining’s line^ | 80.4±11.8 | 82.5±7.1 | 82.0±8.5 | 0.400 |
| Length of McRae’s line^ | 33.8±4.3 | 34.3±4.3 | 34.3±4.3 | 0.709 |
| length of Chamberlain line^ | 75.2±7.3 | 74.5±7.5 | 74.5±7.2 | 0.746 |
| Degree of tonsillar displacement^ | 12.8±5.3 | 10.9±5.5 | 11.5±5.4 | 0.210 |
| The length of the clivus^ | 33.8±5.4 | 33.0±5.0 | 32.97±5.35 | 0.555 |
| NTB angle^ | 135.1±5.2 | 132.4±7.3 | 133.5±6.93 | 0.149 |
| CC angle^ | 151.9±10.3 | 154.2±8.28 | 153.7±8.73 | 0.356 |
| Decompression | 10 (53) | 9 (23) | 19 (32) | 0.035 |
| VP shunt | 0 (0.00) | 5 (13) | 5 (8) | 0.165 |
| Syrinx shunt | 1 (5) | 0 (0.00) | 1 (2) | 0.322 |
| $n(%),*Median (IQR),^Mean ±SD, CVJ+ - With craniovertebral junction abnormalities, CVJ- - Without craniovertebral junction abnormalities, VP - Ventriculoperitoneal, CC - Clival Canal, NTB - The nasion , tuberculum (T) and basion (B) | ||||