Imaging diagnosis and differential diagnosis of enlarged iliopsoas bursa
Objective To explore CT and MRI features of enlarged iliopsoas bursa, To clarify its diagnosis and differential diagnosis. Methods CT/MRI and clinical data of 16 patients with enlarged iliopsoas bursa confirmed by following up,aspiration of synovial fluid or surgical operation were studied retrospectively. Results The lesions in all 16 cases(17 hips) were presented as unilocular(n=14) or multiloculated(n=2) cysts with thin wall, appeared at the level of or part of the acetabulum sections, located in front of the hip joint capsules, posterolateral to the external iliac or femoral blood vessels, 5 bursas extended upwards along the acetabulum and internal surface of the ilium base, protruding into iliopsoas muscle, 9 cases(10 bursas) went downwards and located anterolaterally to pectineal muscle. The biggest diameter of lesions ranged from 1.2-7.8cm, the area(transverse diameter×vertical diameter) at the largest section was from 0.6cm×1.9cm-2.7cm×4.5cm. On CT films 5 cases showed hypodense lesions with CT value from 8-35Hu, the average value was 16HU. In 9 cases examined by MRI, 7 bursas appeared low signal on T1WI, high signal on T2WI, and marked high signal on STIR, 2 bursas(1 case with hematocele, 1 case with empyema) appeared as equal or high signal on T1WI and inhomogeneous high signal on T2WI and STIR. In 2 cases with contrast enhanced CT, mild to moderate enhancement of the cystic wall could be seen.10 cysts communicated with joint cavity, 7 cysts opened auterior to hip joint capsule. Conclusion CT and MRI play important value in diagnosing and identifying the enlarged iliopsoas bursa.
Hip jointBursa of iliopsoas muscleTomographyX-ray computedMagnetic resonance imaging
NETL
NSTL
万方数据
维普
