Adolescent ; Brain ; pathology ; Brain Diseases ; diagnosis ; pathology ; Child ; Diagnosis, Differential ; Female ; Granulation Tissue ; pathology ; Humans ; Magnetic Resonance Imaging ; Male ; Retrospective Studies

Objective To investigate the relationship between histopathological changes of donor liver and those after liver transplantation and explore its effects on prognosis.Methods The histopathological changes of donor liver and post-transplantation live biopsy were observed in 87 cases.Results The percentage of hepatic degeneration at immediate biopsy of donor liver was 100%,the injury of sinusoid endothelial cell accounted for 41.3%,the hepatic steatosis for 18.3%and the necrosis of liver cells for 10.3%.Conclusion Most of the pathological changes of the donor liver during and after liver transplantation are reversible.The damage of the hepatic sinusoidal cells is the important criterion for the observation of ischemia reperfusion injury.Moderate and heavy hepatic steatosis can be used in the liver transplantation. After liver transplantation,if the necrosis of liver cells gradually gets serious,the risk of transplanted liver losing its function gets bigger,so the comparative observation has very important value in diagnosis.

Objective To evaluate the effects and safety of uterine artery embolization for uterine leiomyoma. Methods Total of 185 patients with uterine leiomyoma were treated by UAE. They were followed for one to 6 years to observe the changes of leiomyoma size and improvement in clinical symptoms. Ovarian function was evaluated in 44 cases. Results Bilateral embolization of uterine arteries was performed in 185 patients. Follow-up of 1 ～6 years for 292 leiomyoma indicated that one to 9 months after embolization, shrinkage of leiomyoma size was the most significant factor. One year after embolization, leiomyoma sizes decreased a little. Shrinkage of submucous leiomyoma was more significant than that of intratumoral one, and the latter was more significant than subserous one. Shrinkage of leiomyoma with large size ( volume ≥ 150cm~3) was less than that of small one. Menorrhagia, anemia and pressure symptoms were all resolved. There was no significant difference between pre- and post embolization ovarian hormone level. Conclusions The significant reduction in leiomyoma volume and resolution of clinical symptoms confirmed that the treatment validity of symptomatic leiomyomas by UAE. UAE is an effective therapeutic procedure which has no adverse effect on the ovarian function.

Objective To study the application of SLINKY technique in MRA of head and neck by comparison of four TOF MRA methods. Methods We obtained images on 21 patients and 5 volunteers with SLINKY on all the 26 cases, MOTSA on 18 cases, single volume on 16 cases, and 2D on 12 cases. Three experienced radiologists evaluated the images, unknowing which method the images were. The evaluations included clearness of vessel branches, smoothness of vascular wall, and vascular continuity. Signal-to-noise (SNR), contrast-to-noise (C/Ns), and scan time were measured. Results SLINKY displayed vessel branches better and had better smoothness of vascular wall and vascular continuity than the other three methods(P

Animals ; Cerebral Cortex ; metabolism ; Disease Models, Animal ; Male ; Mice ; Mice, Inbred Strains ; Morphine Dependence ; metabolism ; Neurotrophin 3 ; metabolism ; Prosencephalon ; metabolism

Benzene ; toxicity ; Carcinogens ; toxicity ; Chromosome Aberrations ; Genetic Predisposition to Disease ; Humans ; Leukemia ; chemically induced ; genetics

Objective To study characters of pathology associated with functional alteration of primary brainstem injury (PBI) at different injury severities in rabbits .Methods Animal model of graded PBI was produced using rabbits .Animals were di‐vided into five groups ,group Ⅰ to Ⅳ with an increase of impact power ,10 cases in each group ,and the control group with 5 cases . The pathology characters of PBI were investigated combining dissection observation with unaided eye ,tissue HE histochemical stai‐ning and electron microscope .Results Slight brainstem injury were observed in group Ⅰ ,and pathological results showed regional subarachnoid hemorrhage (SAH) ,stripping of regional cerebral pia mater ,a few petechial hemorrhage in surface ,nerve cell edema , normal medulla sheath and axon roughly .The brainstem injuries were apparent in group Ⅱ ,and the pathological changes indicated SAH in sheet ,petechial and sheeted hemorrhage in surface ,and slight swelling and vacuoles in nerve cells .The brainstem injuries were observed obviously in group Ⅲ ,exhibiting thick SAH ,petechial and sheeted hemorrhage in surface and inside ,degeneration of nerve cells ,abruption of axon ,and atrophy of axoplasm .Eight of ten animals died of respiratory depression induced by brainstem in‐jury in group Ⅳ ,presenting thick hemorrhage in subarachnoid surrounding brainstem ,the whole brainstem injured ,microscopically with multiple small hemorrhage ,nerve cells only residual nuclei ,myelin lamellar severe stratification and fracture ,and axonal tran‐section ,disintegration .No abnormal pathological changes were shown in control group .Conclusion The impacts to brainstem with higher powers lead to more manifest functional and more severe pathological changes ,with an alternation of injury location from surface to deep .

Objective To develop the method of analyzing α-radionuclides using large area grid ionization chamber.Methods Ultrasonic dispersion and vacuum drying system was used to prepare sample source,large standard thin source and plutonium plane source were used to optimize the working condition of spectrometer,and calibrate the instrument for analyzing α emitters.The certified reference materials (GBW04127) were used to verify the accuracy of the method.Results The non-linearity of calibration curve for standard thin sources of neptunium,plutonium and americium was less than 0.2％,and the resolution were 112,84 and 106 keV,respectively.The counting efficiency was 31.2％ for the large standard thin source.The values of specific activity measured in this way were in good agreement with those of the certified reference materials.232Th,238U,230Th,234U/226Ra,210Po,222Rn and 218Po were analyzed in a uranium mineral sample,and their specific radioactivity values were 5.3,3.8,35.6,21.4,27.0,19.6 and 11.1 Bq/g,respectively.Conclusions The method can be used to analyze α spectrum quickly in low-level radioactive environmental samples.

The chromatograms of pyrolysis gas chromatography (PGC) of fifteen strains of Salmonella typhi were reported to see if there is any possible relation of the graphs to serological typing and drug-resistance spectra of the bact. In the fifteen strains there were fourteen clinical strains and one reference strain (Hg01). The results indicated that the clinical strains might be divided into group A and B (7 strains each) by PGC. The graphs drawn from group A organisms were entirely the same in shape while those of group B showed only basic similarity. According to the diversity of graphs of group B organisms, the group B organisms, may be subdivided into group B1 (4 strains), B2 (2 strains) and B3 (1 strain). The graphs within each subgroup were completely the same and those of subgroup B1 exhibited close similarity to that of the reference strain. Albeit no regular connection of chromatograms with serological types and drug-resistance could be seen, the graphs yet provided useful reference for founding a bank of chromatograms, compaed with which salmonella typhi graph could then be identified.

Animals ; Cells, Cultured ; Chondrocytes ; Interleukin-1beta ; NF-kappa B ; Osteoarthritis/drug therapy* ; Rats ; Tumor Necrosis Factor-alpha