Scan Aspects of Transitional Abnormalities of the Lumbosacral Spine at the Medical Imaging Department of the University Hospital Pr Bocar Sidy Sall de Kati

Introduction: Lumbosacral transitional abnormalities are fairly common birth defects in the general population, with a high prevalence in low back pain patients. The objective was to study the detailed epidemiological and CT aspects of lumbosacral transitional anomalies. Materials and Method: This was a retrospective cross-sectional study carried out in the Medical Imaging Department of Professor Bocar Sidy SALL University Hospital in Kati over a period of one year (01 July 2021 to 30 June 2022). A siemens somatom emotion scanner of 16 bars was used for the examinations. We used the castellvi classification to classify the different anomalies. Results: At the end of our study we collected 80 patients with lumbosacral transitional abnormality on 623 lumbar CT performed, a frequency of 12.84%. Lumbosciatica was the first reason for consultation (50%), the average age of our patients was 47 years and the 40-65 age group was in the majority (48.75%) with a male predominance (51%). Sacralization was the most frequent type of transitional anomaly (70%), with a predominance of type IIb, low back accounting for 30% with a predominance of type IIb. The combination of degenerative disc disease, lumbosacral and sacroiliac osteoarthritis was present in 75% of cases, bertolotti syndrome was found in 52.5%. Conclusion: Lumbosacral transitional abnormalities are common in our region. The scanner allowed us a detailed semiological study of these abnormalities of the lumbosacral hinge. Castelvi's type IIb was the most common.