Turkish Neurosurgery 2021 , Vol 31 , Num 3
Illumination of The Relationship between Ureter and Intervertebral Disc by Computed Tomography
Safiye Sanem DERELI BULUT1,Zakir SAKCI1,Sait NADERI2,
1Health Sciences University, Istanbul Umraniye Training and Research Hospital, Department of Radiology, Istanbul, Turkey
2Health Sciences University, Istanbul Umraniye Training and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
DOI : 10.5137/1019-5149.JTN.32650-20.4 AIM: To show the relationship of lumbar intervertebral discs with the ureters by using computerized tomography (CT).

MATERIAL and METHODS: Eighty patients (male/female: 42/38) with a mean age of 45 years were included in this retrospective study. An imaginary line passing through the tangential to the posterior cortex of the vertebral body was drawn at the intervertebral disc level (line a). Perpendicular to this line were two lines (line b) drawn from the ureters.The lines of the cortex, where ?line a? was cut (point c), were also drawn from the contralateral ureter (line d). The distances between ?lines b and d? were measured. Another line was drawn from both ?c? points to the ipsilateral ureters (line x). The angle between ?lines a and x? was measured (angle x).

RESULTS: The right kidney hilus was inferior to the left kidney hilus. A significant negative correlation was observed between line band lumbar level (r=?0.95). The average length of ?line b? at the lower lumber levels was 2.1 cm. Moreover, a positive correlation was found between ?angle x? and lumbar level (p<0.05). The ?angle x? increased from 38° to 80° with the decrease in lumbar levels. In addition, the ?angle x? was significantly higher in male patients (p<0.05) than in female patients. No significant correlation was found between ?line d? and lumbar level.

CONCLUSION: CT is an illumination modality that could elucidate the relationship between intervertebral disc and ureter preoperatively and could visualize the retroperitoneum. Keywords : Ureter, Ureter injury, Computed tomography, Spinal surgery

Corresponding author : Safiye Sanem DERELI BULUT, ssanembulut@gmail.com