CT and MR Imaging Features of Central Nervous System Hemangiopericytoma / 中国医学影像学杂志

Purpose Central nervous system (CNS) hemangiopericytoma (HPC) is rare in clinic and prone to misdiagnosis. This paper aims to improve the diagnostic accuracy of CNS HPC by analyzing the MRI and CT features. Materials and Methods CT and MRI appearances and pathologic features of 14 cases with surgery and pathology proved CNS HPC were analyzed retrospectively. Results There were intracranial and intraspinal lesions in 12 and 2 cases respectively. 5 cases were lobular, 4 cases irregular, and 5 cases were round or oval in shapes. On CT scan, 2 intracranial lesions showed slight hyperdensity and were avidly enhanced following contrast injection. On T1WI, 11 cases showed isointensity compared with brain white matter;on T2WI, 10 cases showed isointensity compared with brain gray matter. Marked heterogeneous enhancement was shown in 7 cases. Necrosis and cystic changes were seen in 6 cases. Flow-void sign was seen in 9 cases;9 cases were attached to meninges through narrow base. Dural tail sign was observed in 4 cases. Bone erosion was seen in 4 cases. In 5 cases with DWI scan, isointensity was shown in 4 cases and slight hyperintensity in 1 case. The density and signals in 2 cervical spine lesions were uniform with homogenous enhancement;expansive bone swelling in 1 case. Conclusion CNS HPC shows hyperdensity on CT. They present equal signal compared with white matter on T1WI and equal signal compared with grey matter on T2WI, with some void signal of vessel, and isointense on diffusion weighted images. Tumor invades adjacent skull with rare dural tail sign.

The role of serum hepcidin and ferroportin1 in placenta on iron transfer from mother to fetus / 中华血液学杂志

<p><b>OBJECTIVE</b>To detect the concentration of serum hepcidin and the mRNA expression level of ferroportin1 (FPN1) in the placenta membrane from full term pregnant women with different degree of iron deficiency, and explore their roles for iron transport in placental.</p><p><b>METHODS</b>The concentration of HGB, serum iron (SI) and serum ferritin (SF) of mothers and infants were detected in 55 full term pregnant women and neonates. The expression level of FPN1 mRNA in placental was detected by the RT-PCR technique. The concentration of serum hepcidin was detected by double antibody sandwich biotin avidin enzyme-linked immunosorbent assay. The serum hepcidin level and the FPN1 mRNA expression in the full term placenta from different maternal iron status were compared in three groups.</p><p><b>RESULTS</b>There were no significant differences in the cord blood HGB, SI and SF of newborns from pregnant women with different iron status (P>0.05). The concentration of serum hepcidin of pregnant women among normal, iron deficiency and mild iron deficiency anemia were (193.637±52.219), (176.523±43.875), and (147.623±37.768) μg/L respectively, with statistical significance (F=3.872, P=0.027). The expression levels of FPN1 mRNA among three groups were 0.462±0.077, 0.507±0.074 and 0.551±0.104 respectively, with statistical significance (F=4.767, P=0.013). A negative correlation between maternal serum hepcidin and placental FPN1 mRNA (r=-0.383, P=0.004) was identified.</p><p><b>CONCLUSION</b>There were no significant differences in the iron status of corresponding newborns from pregnant women with different iron status. With the severity of maternal iron deficiency, the concentration of serum hepcidin was down-regulated, while the expression of FPN1 mRNA in placenta was up-regulated.</p>

MR diffusion tensor imaging of optic nerve in anterior ischemic optic neuropathy at 3.0 T and correlation between diffusion tensor imaging and pattern visual evoked potential / 中华放射学杂志

Objective To study the value of MR diffusion tensor imaging (MR-DTI)using a 3.0 T scanner in anterior ischemic optic neuropathy(AION).Methods A total of 26 patients suffering from unilateral subacute AION were examined using DTI and pattern visual evoked potential(P-VEP).The parameters values of optic nerves including fractional anisotropy (FA),ADC,vertical diffusivity (λ⊥),paralleldiffusion (λ//),P100 value and amplitude were obtained.Paired t-tests were used for comparing the FA,ADC,λ⊥,and λ// values of the two groups.Correlations of DTI parameters and P-VEP parameters were analysed by using the Pearson rank correlation analysis.Results The values of FA,ADC,λ//,and λ_ in the affected nerve were 0.28±0.07,(1.43±0.20) ×103 mm2/s,(1.79±0.16) ×10-3 mm2/s,and (1.25±0.17) ×10-3 mm2/s respectively,and the corresponding values of unaffected nerve were 0.57±0.05,(1.04±0.17) ×10-3 mm2/s,(1.71 ±0.19) × 10-3 mm2/s,and (0.75±0.08) × 10-3 mm2/s respectively.Compared to unaffected contralateral nerves,the mean FA was reduced,the mean ADC,λ⊥ were increased in the affected nerves(t=-19.269,10.537,15.301,P＜0.01).However,there were no significant difference of the λ//(t=l.632,P＞0.05).There was significant negative correlation between ADC and P-VEP amplitude in affected optic nerves (r=-0.722,P＜0.01).There was moderate negative correlation between λ⊥ and P-VEP amplitude in affected optic nerves (r=-0.634,P＜0.01).There was moderate correlation between FA and P-VEP amplitude (r=0.539,P＜0.01).There was no correlation between λ// and P-VEP amplitude.There was moderate negative correlation between FA and P-VEP P100 latency(r =-0.619,P＜0.01).Conclusions DTI can sensitively detect diffusional abnormality of anterior ischemic optic neuropathy.DTI could be used as a supplemental way in the assessment of AION.

Effect of propofol of deuto-anaesth dosage on prevention of emergence agitation / 中国医师进修杂志

Objective To observe the effect of propofol of dento-anaesth dosage on prevention of emergence ngitatian(EA). Methods Forty ASA Ⅰ-Ⅱ patients, aged 32-56 years old and undergoing elective laparoscopic cholecystectomy, were randomly divided into two groups, propofol group (group P, 20 cases) and control group (group C, 20 cases). Anesthesia was induced intravenously with 0.1 mg/kg midaxolam, 1.0 mg/kg propofol, 2 μg/kg fentanyl and 0.15 mg/kg vecuronium. Anesthesia was maintained by intravenous and inhalation combined anesthesia. Vecuronium was discontinued about 15 min before the end of sur gery. After entered the postoperative care unit, patients in group P received propofol (0.5 mg/kg) and those in group C were administrated with normal saline (0.05 ml/kg). Time to recovery of spontaneously breathing, duration of opening eyes on verbal command, extubation time were recorded. Incidence of EA in both groups was calculated. Results Time to recovery of spontaneously breathing, duration of opening eyes on verbal com-mand and extubatian time in group P [(15.6±4.5), (18.2±6.5), (22.6±5.5) min, respectively] were sig-nificantly longer than those in group C[(13.2±5.4), (15.7±6.2), (18.4±6.8) min, respectively ]. In-cidence of EA in group P(5% ) was significantly less than that in group C(30%). Conclusion The propofol of dento-anaesth dosage can obviously decrease the incidence of EA in patients undergoing elective laporo-scopic cholecystectomy.