Objective To investigate the CT,MRI features and differential diagnosis of central nervous system primitive neuroec-todermal tumors (cPNET).Methods The CT and MRI findings of 1 5 cases with cPNET proved by pathology were analyzed retro-spectively,and we summarized the imaging features and differential diagnosis.Results For this group,the average age was (8.82± 2.53)and the male to female ratio was 9 ︰6.All lesions located in supratentorial region,which had relatively large volume (average diameter of 6.3 cm),cystic necrosis (12/15),and no or mild peritumoral edema.cPNET showed isodensity,slight hyperdensity or slight hypodensity on CT plain scan,and demonstrated uniform or inhomogeneous enhancement.On MRI plain scan,solid part showed isointensity or slight hypointensity signal on T1 WI,isointensity or slight hyperintensity signal on T2 WI,hyperintensity sig-nal on DWI(12/15),isointensity(9/15)or slightly hyperintensity signal on FLAIR,and showed obvious uniform,honeycombed or irregular enhancement after enhanced scan,no enhancement in cystic necrosis.Conclusion cPNET have certain characteristics,inclu-ding the lower onset age,relatively large volume with well-defined edge and no or mild peritumoral edema,hyperintensity signal on DWI,isointensity signal on FLAIR.

Objective To retrospectively analyse the detection results of human leukocyte antigen(HLA) B27,and discuss its diagnosis value in disease such as ankylosing spondylitis(AS).Methods HLA-B27 detection was performed on 1 335 suspected AS patients treated in the hospital from January 2015 to June 2016 by using multiparameter flow cytometry instrument.The test results showed 201 patients were diagnosed with AS(AS group),1 134 patients were diagnosed with rheumatoid arthritis and other related diseases (non AS group).The test results were shown by using mean fluorescence intensity and positive lymphocyte expression rate.n addition,120 healthy people were enrolled as the control group in the physical examination center of the hospital.Results The positive rate of HLA-B27 screening in suspected AS patients was 15.73% (210/1 335),and the positive rate of HLA-B27 screening in the control group was 2.50% (3/120).The positive rate of HLA-B27 screening,the rate of cell expression and the average fluorescence intensity of AS group were 92.03%(185/201),(85.34±17.99)%,8.74±4.20,significantly higher than the non AS group and the control group(P<0.01).There was no significant difference between the control group and the non AS group (P>0.05).HLA-B27 screening positive patients were mainly concentrated in adolescence,and the positive rate of male was higher than that of female (P<0.05).Conclusion Flow cytometry examination of HLA-B27 can provide important basis for the diagnosis and differential diagnosis of AS.

Clinical data of 65 patients with acute cerebral infarction (frontal or temporal or both lobes) treated in our hospital during 2015-2016 were retrospectively reviewed.The patients were followed up for 6 months,34 cases were diagnosed as vascular dementia (VD) according to ICD-10 (VD group) and 31 cases were diagnosed as simple cerebral infarction (control group).The abnormal rate of electroencephalograph (EEG) at baseline in VD group was significantly higher than that in control group (x2 =5.44,P =0.02).Compared to control group,the powers of slow wave (θ wave and δ wave) at baseline,third month and sixth month in VD group were significantly increased (Fbet groups =17.39,Finner groups =163.50,Finteraction =38.71;all P =0.00) and (Fbetween groups =5.10,Finner groups =119.04,Finteraction =6.54;P ＜ 0.05).Compared to baseline,the α wave and β wave were significantly decreased at third month and sixth month in VD (Finner groups =116.40,P =0.00) and (Finner groups =55.90,P ＜ 0.05).Compared to control group,the powers of θ wave (except in the frontal lobe at baseline and third month) and δ wave were significantly increased at all time points (P ＜ 0.05).Except the θ wave in occipital lobe,there were significant differences in slow wave at all time points between VD group and control group (P ＜ 0.05).The featured EEG with increased slow wave in many regions of cerebral infarction can be used for early diagnosis of VD in patients with cerebral infarction.

Objective:To investigate the efficacy of Xiaoshuan Changrong Capsules combined with donepezil hydrochloride in the treatment of patients with vascular dementia and their effects on serum cytokines and oxidative stress. Methods:A total of 102 patients with vascular dementia who received treatment in Hangzhou Seventh People's Hospital, China between January 2019 and January 2021 were included in this study. They were randomly divided into control and observation groups, with 51 patients per group. The control group was treated by oral donepezil hydrochloride. The observation group was given oral Xiaoshuan Changrong Capsules combined with oral donepezil hydrochloride. All patients were treated for 12 weeks. Efficacy was compared between the two groups. The Clinical Dementia Rating score, the Mini-Mental State Examination score, and serum levels of interleukin 6, insulin-like growth factor-1, tumor necrosis factor-α, superoxide dismutase and malondialdehyde were compared between before and after treatment. Results:Total response rate in the observation group was significantly higher than that in the control group [90.20% (46/51) vs. 70.59% (36/51), χ 2 = 6.22, P < 0.05]. At 12 weeks after treatment, the Clinical Dementia Rating score in the observation group was significantly lower than that in the control group [(1.34 ± 0.27) points vs. (1.89 ± 0.31) points, t = 9.55, P < 0.05]. At 12 weeks after treatment, the Mini-Mental State Examination score in the observation group was significantly higher than that in the control group [(25.45 ± 1.98) points vs. (22.32 ± 2.10) points, t = 7.74, P < 0.05]. At 12 weeks after treatment, interleukin-6, insulin-like growth factor-1, and tumor necrosis factor-α levels in the observation group were (31.28 ± 7.35) ng/L, (0.34 ± 0.08) ng/L and (9.46 ± 2.27) ng/L, respectively, which were significantly lower than those in the control group [(46.43 ± 6.28) ng/L, (0.48 ± 0.07) ng/L, (20.98 ± 3.56) ng/L, t = 11.19, 9.40, 19.48, all P < 0.05]. At 12 weeks after treatment, superoxide dismutase in the observation group was significantly higher than that in the control group [(98.91 ± 7.25) U/L vs. (86.59 ± 5.63) U/L, t = 9.58, P < 0.05] . At 12 weeks after treatment, malondialdehyde in the observation group was significantly lower than that in the control group [(3.25 ± 0.50) mmol/L vs. (4.81 ± 0.35) mmol/L, t = 18.25, P < 0.05]. Conclusion:Xiaoshuan Changrong Capsules combined with donepezil hydrochloride is highly effective on vascular dementia. It can reduce cellular inflammatory response and improve oxidative stress response. This study is of great innovation and science.