Primary intrahepatic stone is a common disease in China. It is difficult to treat this benign biliary tract disease because it has many complications and the surgery is difficult. Understanding the cause of this disease has important implications in prevention and treatment. This article reviewed the cause of primary intrahepatic stone from four aspects: imbalance of bile components, infection, bile protein, and macromolecular and metabolism of the cells.

Objective To get a better understanding of the characteristic MRI appearances of cerebral MS lesions.Methods 61 patients with clinically diagnosed multiple sclerosis were examined with SE sequences,using 0.5T super-conducting scanner.The MRI features of MS were analyzed.Results All of the patients in 61 cases were found MS lesions in MRI.The lesions in cerebral,brainstem,and cerebellum were clearly visualized,but in optic nerves were not so good.The MS foci appeared low or middle signal intensity in T 1WI and high signal intensity in T 2WI.It was playing an important role in the diagnosis of the MS that the paraventricular lesions were perpendicular to the lateral ventricles and there were MRI abnormal signals in corpus callosum with shrinking. Conclusion MRI can show the characteristic appearances of MS lesions,demonstrate many more lesions that not visible on CT scan,provide informations about the number,size,location and extent of the lesions therefore MRI is the first method of choice in the diagnosis of MS.

Objective To observe the expression of CD_(25),CD_(25) mRNA,interleukin-1?(IL-1?) in peripheral blood of newborns with hypoxic-ischemic encephalopathy(HIE) and its clinical significance.Methods The peripheral blood mononuclear cells(PBMC) of newborns with HIE and normal controls were isolated by routine Ficoll-Hypaque,and the level of CD_(25) induced and non-induced by phytohernagglutinin(PHA) were detected by biotin-streptavidin(BSA),CD_(25) mRNA was detected by real-time PCR and IL-1? in serum was detected by enzyme-linked immunosorbent assay on the first,third and seventh day after birth.The final expressive level of CD_(25) mRNA was based on rate of CD_(25) cDNA and gluceraldehyde phosphase dehydrogenase(GAPDH).Results On the first day,the positive rates of CD_(25) induced and non-induced by PHA and IL-1? were(3.6?1.1)%,(20.9?4.8)%,(17.7?8.2) ng/L,respectively.There were significant differences in HIE group and normal controls(P0.05).Conclusions There is obvious inflammatory(rea)ction in babies with HIE.The main character of PBMC of newborns is all infantile and undifferentiated,which surface sign is infantile,and lower level of CD_(25) is expressed.However,the level of CD_(25) mRNA can be expressed consistently during the course of disease.The immunity and immune regulative response in newborns is gradually built up during the growth and can participate in recondition of brain injury caused by HIE.

BACKGROUND:White spot lesions caused by enamel demineralization are a common side effect of orthodontic treatment. Resin infiltration treatment for white spot lesions has obtained favorable effects, but there is no report on the difference between resin infiltration and fluoride varnish treatment for post-orthodontic white spot lesions. OBJECTIVE:To compare the efficiency of resin infiltration and fluride varnish for treatment of post-orthodontic white spot lesions. METHODS:Twenty-nine patients with post-orthodontic white spot lesions were randomly divided into two groups:one group accepted the resin infiltration treatment and the other group accepted fluoride varnish treatment. Frontal intraoral photos before treatment and 6 months after treatment were col ected for study. The difference in efficiency of resin infiltration and fluride varnish for treatment of post-orthodontic white spot lesion was analyzed and evaluated by both dentists and College students who were not engaged in oral medicine. RESULTS AND CONCLUSION:Except one patient treated with fluride varnish, al the patients completed the referral on schedule. There was significant improvement in the two groups after treatment (P<0.05). Resin infiltration treatment was better than fluoride varnish treatment in post-orthodontic white spot lesions. Thus, resin infiltration that requires fewer referrals and has better effects is an ideal therapy for post-orthodontic white spot lesions.

Acupuncture Therapy ; Adolescent ; Adult ; Aged ; Chronic Disease ; therapy ; Female ; Humans ; Male ; Middle Aged ; Pterygopalatine Fossa ; innervation ; Rhinitis ; physiopathology ; therapy ; Smell ; Treatment Outcome ; Young Adult

Purpose:To explore the clinical and pathological characters and immunophenotype of 2 cases nasal type extranodal NK/T cell lymphoma primarily derived from adrenal gland.Methods:The clinical and pathological features of the 2 cases were analyzed and the immunostaining for UCHL-1,CD43,CD3,CD56,TIA-1 and LMP1 was performed using EnVision TM . IgH and TCR? gene rearrangement was analyzed by using PCR techniques.Results:Both patients were male and aged 50 and 51. Occupying masses in their right adrenal glands was detected. The two tumors showed similar morphological features, composing of small to middle sized and multi formed cells and growing invasive. Inflammatory background,necrosis and vessel involvement were seen. Positive surface staining of UCHL-1,CD43,CD56 and cytoplasma staining of CD3 was demonstrated. TIA-1 and LMP1 expression was also detected. No clonal rearrangement in both IgH and TCR? genes was detected.Conclusions:Nasal type extranodal NK/T cell lymphoma can occur primarily in adrenal gland. It should be distinguished from other small cell malignant tumor of this site.

Objective To evaluate MRI in diagnosis and follow-up of Achilles tendon rupture. Methods From April 2003 to May 2005, 24 cases of closed Achilles tendon rupture were examined in our department with MRI. It was performed through sagittal T1WI, T2WI, GE-STIR and axial TME imaging. Four cases were followed up with MRI after 4 to 8 weeks. Results MRI could determinate the severity and exact location of Achilles tendon rupture by demonstrating signal changes of Achilles tendon. In this series, complete rupture of Achilles tendon mostly occurred at the median part, with augmentation and high signal on T2WI. MRI demonstrated high signal on T2WI in partial rupture of Achilles tendon. The signal intensity in the four cases followed up by MRI was shown to decrease. Conclusion MRI is a valuable tool for clinical diagnosis and follow-up of Achilles tendon, because it provides enough information through signal changes at the tendon.

Objective To investigate the characteristics of human immunodeficiency virus(HIV-1)V3 loop amino acid mutations among AIDS patients in Shenzhen. Methods Fragments of HIV-1 env gene were amplified by RT-nested-polymerase chain reaction(PCR)from plasma of the AIDS patients in Shenzhen.The PCR products were then directly sequenced and the sequences were aligned,translated and analyzed. Results Sequence analysis showed that there were B and CRF01-AE HIV-1 subtypes in Shenzhen.The V3 loop terra peptide GPGQ accounted for about 48%,GPGR about 36%,other V3 loop terra peptide forms were 16%;the V3 loop central motif in the majority(76.9%)of the CRF01-AE strains was GPGQ,the majority(75%)of the B strains was GPGR.We also found some unusual terra peptide compositions:DQDR and DQGQ on the tip of V3 loop,some amino acid mutations at specific of V3 loop associated with SI phenotype were very common in AIDS patients(80%). Conclusions The V3 loop amino acid mutations were very common in AIDS patients,the V3 loop central motif in the majority was GPGQ and GPGR in Shenzhen,the mutations shows the change of HIV-1 phenotype and predicts that disease progress to AIDS.

Objective To study the relationship between the mutation of androgen receptor(AR) gene and the development of human prostat e cancer. Methods All exons of AR gene except trineucl eic acid repeat polymorphism were amplified by PCR and selected by single strand conformation polymorphism( SSCP) in 27 paraffin-embedded slides of human pros tate cancer. The abnormal mobility shifts were further detected by direct DNA c ycle sequencing. Results Three abnormal mobility shifts respectively in exon A.D.G were found by SSCP in three prostate cance r tissues. One point mutation was found in 296 amino acid (C 966→A,Ser29 6Arg) from exon A.This point mutation has not been reported before. Conclusions This mutation might change the transcriptive activity of AR, and it might be correlated to PCa progression.

Objective To investigate the MRI features and the diagnostic value of uterine leiomyoma.Methods All cases were examinated by MRI and ultrasound.Retrospective analysis of MRI manifestations of 71 uterine leiomyomas in 32 patients in combination with the results of operation and pathology was carried out and was compared with ultrasound findings.Results The MRI features of the tumors were:intermediate or slightly low signal intensity on T 1WI and low signal intensity on T 2WI,patch hyperintense areas were seen in degenerated leiomyoma on T 2WI,there were clear margins in all tumors and capsules in most tumors(55/71).MRI was superior to sonography in showing 