The Diagnosis of Femoroacetabular Impingement Syndrome: the Role of The MRI

The aim of the study was to determine the role of MRI in diagnostics of femoroacetabular impingement syndrome of the hip. Materials and Methods. MRI-scanning results were analyzed for 142 persons (63 (44.4%) males, 79 (55,6%) females; mean age 34 ± 3.2 y.o.), 122 (85.9%) of them had complaints of pain sensation located in the hip joint. All the patients were divided into two groups: an experimental group (n = 122 (85.9%; 62 (50.8%) males, 60 (49.8%) females; mean age 33 ± 5.7 y.o) and a control group (n = 20 (14.1%); 15 (75.0%) males, 5 (25.0%) females; mean age 30 ± 3.8 y.o.). The enrollment criteria for the control group were: absence of complaints of pain sensation located in the hip joint, under sixty years of age. The age limit was provided the high risk of involutional changes in the hip within the patients of this age. In all patients MRI examination were done by high-field MR-scanners associated to designed protocol. While interpreting the results values of neck-shaft angle, lateral center edge angle, Tonnis angle and alpha angle were determined. Results. Different types of femoroacetabular impingement syndrome were determined in 35 (28.7%) patients. In all patients pathologic parameters were observed: abnormal (< degrees) neck-shaft angle (n = 11; 31.5%), abnormal (>39 degrees) lateral center edge angle (n = 17; 48.6%), abnormal (<0 degrees) Tonnis angle (n = 12; 34.3%) and abnormal (>55 degrees) alpha angle (n = 17; 48.6%) were determined. Conclusion. MRI allowed to determine abnormality of configuration of the femoral bone and acetabulum, to characterize the pathological conditions of the labrum and subchondral bone. The main symptoms of femoroacetabular impingement syndrome are pathologic configuration of the femoral head and acetabulum. The degeneration and tear of the labrum could be observed in the early stage of disease.

фемороацетабулярный импинджмент-синдром, вертлужная губа, метод радиального сканирования, магнитно-резонансная томография, femoroacetabular impingement syndrome, labrum, radial scanning method, magnetic resonance tomography

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