Objective To assess the value of MRI in diagnosis of Herlyn-Werner-Wunderlich syndrome (HWWS).Methods MR images of 10 patients with HWWS confirmed surgically and pathologically were analyzed retrospectively.The classification of HWWS on MRI was discussed.Results The 10 patients were included 4 cases of type Ⅰ,3 cases of type Ⅱ and 3 cases of type Ⅲ.All of them were complicated with ipsilateral renal agenesis.Eight cases were complicated with didelphic uterus and double cervix,2 were complicated with complete septate uterus.Type Ⅰ showed the complete oblique vaginal septum,hematocele in the oblique septum cavity and contralateral uterine cavity.Type Ⅱ showed the oblique septum cavity was connected with main vaginal through the hole of septum.Type Ⅲ showed the oblique septum cavity was connected with main vaginal through the cervical fistula.The prognosis were good in 8 patients.One patient occured obvious dysmenorrhea postoperation and MRI reminded right ovarian endometriosis cyst.One patient occured gusty hypogastralgia,and MRI reminded pelvic inflammation.Conclusion MRI can definitely diagnose and classify HWWS,and can provide useful information in the treatment of HWWS.

Objective To observe the quantitative corpus callosum (CC) segmentation MRI topology and brain white matter tractography variations in patients with multiple sclerosis (MS),and to assess the correlation between quantitative indicators and scores of expanded disability status scale (EDSS).Methods Conventional MRI and diffusion tensor imaging (DTI) were applied in 32 MS patients and 32 healthy volunteers,admitted to our hospital from June 2011 to June 2013.The areas,average diffusion coefficent (ADC) values,fractional anisotropy (FA) values and tracked lines of each CC segment (1-5) and total CC were measured.T tests were used to compare the above quantitative indices in MS patients with those in controls.Linear regression model was used to determine the relationship between quantitative indices and scores of EDSS in MS patients.Results Various degrees of damage of white matter tracts in CC of MS patients could be visually identified by tractography.The areas,FA values and tracked lines of each CC segment in MS patients were smaller than those in controls (P＜0.05),and the ADC values of segment 1-3 in MS patients were larger than those in controls (P＜0.05).Moreover,the areas ([549.13±64.07] mm2),FA values (0.55±0.05) and tracked lines (519.78±79.03) of total CC in MS patients were smaller than those in controls ([614.56±39.67] mm2,[0.67±0.02] and [612.34±39.51],P＜0.05),and the ADC values ([0.93±0.09]×10-3 mm2/s) of total CC in MS patients were larger than those in controls ([0.86±0.03]×10-3 mm2/s,P＜0.05).Both areas and tracked lines of each CC segment in MS patients had negative correlations with EDSS scores (P＜0.05).Moreover,both areas and tracked lines of total CC in MS patients were found having negative correlations with EDSS scores (r=-0.686,P=0.000;r=-0.676,P=0.000).Conclusion Both areas and tracked lines of each CC segment and total CC reflect the degrees of clinical disability in MS patients,which can be used for disease and efficacy evaluation of MS patients.

Objective To investigate the high risk factors of portal vein thrombosis (PVT) after splenectomy and to evaluate CT/MRI in predicting PVT formation.Methods Clinical data of 179 patients with hepatic fibrosis/cirrhosis who underwent splenectomy in the Third Affiliated Hospital of Sun Yat-sen University from January 2005 to March 2016 were retrospectively analyzed. The informed consents of all patients were obtained and the local ethical committee approval was received. There were 148 males and 31 females with the mean age of (44±12) years old. PVT was diagnosed by CT/MRI and the volume of spleen and the diameter of portal vein were measured. The patients were divided into PVT group (n=77) and control group (n=102) according to the formation of PVT or not after operation. Single factor analysis and multivariate Logistic regression were used to analyze the independent risk factors of PVT formation. The predictive value of CT/MRI for the risk of PVT formation was determined according to the distribution of spleen volume and portal vein diameter of patients.Results Multivariate Logistic regression analysis showed that preoperative spleen volume, portal vein diameter, PT, operative procedure and the D-value of pre- and post-operative PltΔP7 andΔP14 were the independent influencing factors of PVT formation (OR=4.563, 4.443, 4.369, 3.094, 2.117, 1.378; P<0.05). The risk of PVT formation after splenectomy increased significantly when the preoperative spleen volume was≥1100 cm3 or the portal vein diameter was≥17 mm (χ2=25.470, 16.820; P<0.05).Conclusions There are many complicated factors affecting PVT formation after splenectomy in patients with simple hepatic fibrosis/cirrhosis. Preoperative CT/MRI measurement of spleen volume and portal vein diameter can provide important information in predicting the risk of PVT formation.