CT and MRI Manifestations of Lumbar Spinal Epidural Angiolipoma / 中国医学影像学杂志

Purpose To investigate the imaging features of lumbar spinal epidural angiolipoma, and to improve the imaging diagnostic capability of the disease. Materials and Methods Four patients with lumbar spinal epidural angiolipoma confirmed by pathology were recruited in the study. CT and MRI images were reviewed and the imaging characteristics including the shape, size, location, density, and signal intensity were analyzed. Results The lesions located at the right front of the spinal canal in two cases, at the left front in one case, and the residual one case located directly behind the spinal canal. The longitudinal axis of the lesions paralleled to the longitudinal axis of the spine. The dura mater spinalis was compressed and inward shifted. All of the four cases showed homogeneous iso- or hypo-density on CT without calcification or necrosis in the lesions. The maximum diameter was 3 to 5 cm. The boundary was clear and smooth. Three lesions showed dumbbell-shaped and crossed foramen, but the adjacent bone were not absorbed or destructed. One lesion showed scallop-like. On MRI, four cases displayed slightly hypointense on T1WI and hyperintense on T2WI. On STIR images, the lesions showed hyperintense with patchy low signal intensity in it. The boundary of the lesions was clear. After administration of contrast media, two lesions presented remarkably homogeneous enhancement, one lesion showed dual tail sign, and one lesion displayed pen-tip-like at the both ends. Conclusion MRI plays an important role in locating the lesion and distinguishing internal tissue components of spinal angiolipoma, which is the gold standard for the diagnosis of the tumor. CT provides excellent supplement. The Combination of CT and MRI will improve the diagnostic accuracy of the spinal angiolipoma.

Occult pancreatobiliary reflux / 中华普通外科杂志

Objective To investigate the incidence of occult pancreatobiliary reflux and to evaluate its relation to gallbladder epithelial dysplasia and cancer. Methods From July 2006 to Feb 2008,956 cases underwent selective biliary procedure or preoperative endoscopic retrograde cholangiopanereatography (ERCP), bile was collected and amylase was measured. All removed gallbladders were pathologically examined for dysplasia and cancer. Results Occult pancreatobihary reflux was found in 75 of 754 patients in this study, with an incidence of 9. 9%. The biliary amylase values in the patients with occult pancreatobiliary reflux and in controls were 7701±20 378 IU/L and 16±51 IU/L, respectively ( P <0. 01 ).Gallbladder dysplasia and cancer were found in 31.0% and 3.4% of the patients with occult pancreatobiliaryreflux, respectively, and both were higher than those in the patients without pancreatobiliary reflux ( P <0. 05). In the patients with occult pancreatobiliary reflux, the biliary amylase level with gallbladder dysplasia or cancer was 2388 ± 2745 IU/L and was higher than those without gallbladder dysplasia or cancer (P < 0. 01 ). Conclusions With an incidence of 9.9% in patients of normal pancreatobiliary junction,the occult pancreatobihary reflux may contribute to the pathogenesis of gallbladder epithelial dysplasia and cancer.

The Measurement of Hippocampal T_2 Relaxation Time in Healthy Chinese and Its Influencing Factors / 实用放射学杂志

0.05).However,HCT2s of right side and left side were significantly negatively correlated to age(r=-0.606,-0.522;P=0.000,0.000).Conclusion HCT2s in healthy Chinese aged 10~59 year measured on SE dual echo images are quite stable,and age is an influencing factor of HCT2,but not side,sex and handedness.