Morphometric Measurements of Cranio-Vertebral Junction among Nepalese Population

Abstract

The craniovertebral junction area refers to the osseous structures consisting of the occipital bone that surrounds the foramen magnum, the atlas, and the axis vertebrae. There is sparse literature about the morph metric measurement of craniovertebral junction region. We aim to derive a range of various measurements incraniovertebral junction area. This is a hospital based single center retrospective study conducted in our center among 100 consecutive computed tomography scans of craniovertebral junction obtained in adult patients who were admitted to our tertiary hospital for treatment of non-craniovertebraljunction conditions between 2017 and 2018.Various craniovertebral junction morphology parameters were measured and confidence interval at 95% were obtained the range at 2standard deviation. Among 100 patients studied, 51% of them were males while 49% were females. Mean age was 35.1±10.4 years with range from 15 to50 years. Computed tomography measurement of craniovertebral junction revealed meanders height of 30.8±2.5 mms, dento-clivaldistance was 5.9±1.6 mms and mean McRae’s distance of 34.2±2.49 mms. Similarly, anterioratlantodental interval was calculated to be1.83±0.47 mms and posterior atlantodentalinterval was 17.72±0.21 mms while Modified RW distance was 24.43±2.09 mms and Redlund Johnell distance was calculated to be 31.5±4.29mms. Normal morphometric measurements ofcraniovertebral junction can be useful for evaluating abnormalities of the craniovertebraljunction which can potentially improve the diagnostic criteria of most abnormalities.

Evaluation of Cranio-Cervical Junction on Multidetector Computed Tomography

“…In our study, RedlundJohnell distance was found to be 3.483±0.438 cms. We found our data consistent to that of the study by Ranabhat et al [13] Statistically significant difference was found between BAI, DH, RAOI, LAOI, PADI, RLJD, mRWD in gender (p<0.05) and no statistically significant difference were observed between BDI, AADI, PR, MR in gender. (p>0.05).…”

“…Ranabhat et al found that the mean of 0.183±0.047 cm with minimum distance of 0.1cm to maximum distance of 0.35 cm. [13] In our study, the mean AADI measurement was 0.149±0.043 cm, and similarly mean RAOI in male and female was found to be 0.144 cms and 0.130 respectively. Similarly, LAOI in male and female was found to be 0.143 cms and 0.132 cms respectively (Table -2).…”

“…Ranabhat et al found the PADI of 1.772±0.021 cms with minimum distance of 1.41cm to maximum distance of 2.55cms. [13] In our study, PADI was calculated to be 1.766±0.193 cms with minimum distance of 1.24 cm to maximum distance of 2.44 cms. Our data was found to be consistent with the study by Ranabhat et al [13] This might be because of the similar population of both the study i.e.…”

“…[13] In our study, PADI was calculated to be 1.766±0.193 cms with minimum distance of 1.24 cm to maximum distance of 2.44 cms. Our data was found to be consistent with the study by Ranabhat et al [13] This might be because of the similar population of both the study i.e. in Nepalese population.…”

“…[19] Ranabhat et al found mean mRWD of 2.443 cms. [13] In our study, modified RWD was calculated to be 2.688±0.215 cms with minimum distance of 2.21cm to maximum distance of 3 cm. In male, we found mean mRWD as 2.771±0.193 cms and in female it was 2.578±0.192cms.…”