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Objective To investigate the X-ray photographic and magnetic resonance imaging (MRI) features of hip pigmented villonodular synovitis (PVNS). Methods A retrospective analysis was carried out in 19 patients with hip PVNS confirmed by operation and pathological examination.The X-ray plain photography in 10 patients and MRI features in 19 patients (of which 9 received enhanced scan) were analyzed.Results (1)The results of X-ray photography were as follows:Of 10 patients,6 showed swollen joint capsule,2 had higher-density masses around the joint;joint space narrowing was found in all of the 10 patients;except 2 patients,8 showed various degrees of bone erosion in the margin area of the joint,in the intertrochanteric area and around neck ,and showed capsule-like clear focus area with sclerotic margin in the joint surface of the bone;bonespur was found in the edge of the joints of 4 patients,of which 3 were complicated with osteoporosis.(2)The manifestations of MRI features:of 19 patients with hip PVNS,17 were differentiated as the diffused and 2 as the focalized.All of 17 diffused hip PVNS showed different degrees of diffuse hyperplasia of synovium,5 of them had intra-articular effusion,13 showed multiple-diffused nodular synovial changes with low signals of T1WI and T2WI,14 showed different degrees of bony erosion and depression in acetabulum,in the head of the femur and around the neck,which signals were similar to those with synovial hyperplasia.Of the 14 patients,8 foci presented circular low signals,capsule-like clear images under the bony joint surface with medium to low signals of T1WI and T2WI,and diffused swelling close to medullar cavities with sheet-like high signals of T2WI/STIR.The results of contrast-enhanced scanning for 8 of the 14 patients showed enhanced signals in the joint synovium and focus area of joint bones.Two focalized PVNS patients showed single mass on the outer flank of the femoral neck with medium to low T1WI signal and with medium to high T2WI signal,and also presented multiple dot-like and nodule-like foci with low T1WI and T2WI signals.One of the 2 focalized PVNS patients showed arc-shaped bone erosion at the outer margin of the femur.Conclusion MRI features of hip pigmented villonodular synovitis exert specific characteristics,which are valuable for the diagosis of PVNS;X-ray plain photography has indicative value for the diagnosis,but it has limitation.
RESUMO
In 51 patients with gastrointestinal diseases,diseases,abdondnal X-lay Photos at lying POSition weretaken 6.5 hours after barium ined and 12 healthy volunteers served as coneal. The longitudinal axis,the transverse diameter,the number and the height of colonic bags in the colonic X-ray photes at fillingand evacuating Phases were counted.Chronic colitis was mainly manifested as loose stool, alternation ofconstipation and diarrhea,dyschesia or abdominal pain whenever desire to defecate. The colonic X-rayphotos showed that the diameter and the number of colonic bag in chronic colitis were reduced and the evacuation of barium became accelerated.These colonic X-ray images can explain the pathophysiologicmechasm of the above manifestations and may serve as a kinetic index providing evidence for the clinicaldiagnosis and treatment of the disease.