Objective To eraluate the methods and results of endoscopic mucosal resections for colonic laterally spreading tumors with early malignant degeneration. Methods The pit pattern was studied with magnitying colonoscopy and mucosal staining technique for colonic laterally spreading tumors (LST) undergoing early earcinatous degeneration. They were removed with endoscopic mucosal resection techniques. A follow-up study was made. Results Eight patients suffering from early carcinoma on top of colonic laterally spreading tumors were followed-up. ① 75% of the lesions were situated in the rectum, sigmoid colon and decending colon. ② 75% of the lesions were larger than 30mm in diameter. ③ 75% of the lesions belonged to Ⅳpit pattern. ④ 62.5% of the lesions were Villous adenomas and 75% of the onalignant change involved the mucosa only. ⑤ All the lesions were completely removed by EMR, ⑥ No local residual lesion, recurrence or metastasis was discovered in all the patients after a mean follow-up period of 20.7 months. Conclusions Most of the early carcinomas originated from colonic LST involved the mucosa only. Endoscopic mucosal resection may be a curative method for the early cancer arising from colonic LST.

Female ; Humans ; Hypothyroidism ; drug therapy ; Infant, Newborn ; Thyroxine ; poisoning ; therapeutic use

Objective To study early diagnosis and treatment of post transplant lymphoprolifer- ative disorder in allogeneic hemopoietic stem cell transplant recipients.Methods A 16 years old patient with severe aplastic anemia received HLA-mismatched sibling allogeneic hemopoietic stem cell trans- plant after conditioning with cyclophosphamide/antithymocyte globulin/methylprednisolone(CY/ ATG/MP)regimen.Results On the day 72 posttransplantation,he developed lymphoproliferative disorder.After withdrawal of CsA,he was treated with methylprednisolone,intravenous immune globulin and IFN alpha,and recovered completely from PTLD.Conclusions PTLD is a rare and fatal complication of both solid-organ and hemopoietic stem cell transplantation.Surveillance for PTLD by PCR for circulating EBV-DNA may be appropriate in high risk settings.Early diagnosis,immunosup- pression therapy reduction or even withdrawal in time is important.

Background Traction of epiretinal membrane results in macular morphologic change and visual functional impairment in eye with idiopathic epiretinal membrane (IERM),therefore figuring out their relationship is helpful for evaluation of disease prognosis.Objective This study was to observe the morphological change of macula and microstructure,and analyze the relationship between retina thickness,integrity of cone outer segment tips (COST) line in fovea and visual acuity.Methods This was a retrospective case-observational study.Fifty-six consecutive cases diagnosed as IERM in Zhongshan Ophthalmic Center from March 2011 to December 2011 were enrolled in this study,and all the patients showed unilateral IERM with the normal fellow eyes.Sixteen patients were males and 40 were females,with a mean age of (61.05 ± 6.58) years old.Spectral-domain optical coherence tomography (SD-OCT) examination was performed on the eyes,and Macular Cube (512×128) and HD 5 Line program were selected.Mean retinal thickness of central area (＜1 mm diameter),inner ring area (1-3 mm diameter) and outer ring area (＞3-6 mm diameter) of macula and the status of COST line (intact or fractured) was recorded.Mean thickness of whole macular areas and the difference of foveal microstructure were compared,and the correlation between retinal thickness and visual acuity was analyzed using Pearson linear correlation analysis.Related parameters including age,visual acuity,retinal thickness were also compared between the continuous COST lines group and the fractured COST lines group by independent sample t test.Results The flatted or disappeared fovea was seen in IERM eyes on the SD-OCT image.Retinal thicknesses were (446±89)μm,(418±64)μm and (328±34)ttm in the central area,inner ring area and outer ring area of macula in the IERM eyes,exhibiting significant increasing in comparison with (250±22) μm,(319±17) μm and (279±17) μm in the normal fellow eyes (t=13.370,9.523,7.769,all P =0.000).Significantly negative correlations were found between the visual acuity and the central macular thickness,inner ring thickness or outer ring thickness (r=-0.686,-0.653,-0.417,P＜0.05).In the IERM eyes,COST band was intact in 20 eyes and lack in 36 eyes.Compared with COST band intact group,aging,worse vision and increased retinal thickness were seen in the COST band absent group (t =2.109,P =0.039 ; t =-4.093,P =0.000 ; t =6.669,P=0.000;t=5.376,P=0.000;t=4.247,P=0.000).COST band was clear in all the normal fellow eyes on the SD-OCT image.Conclusions Increase of macular thickness and disruption of COST band reflect the visual function damage in IERM eye.Deficiency of COST band on OCT image seems to be an early indication of photoreceptor damage.Incomplete fovea COST band is often seen in older patients.

Objective To confirm whether miR-216a suppresses cell proliferation and induces cell apoptosis by targeting PKCα, thus to reveal molecular mechanism that miR-216a functions as a tumor suppressor in gastric cancer .Methods PKCα3′untranslat-ed region(UTR)-luciferase vector was constructed and dual-luciferase reporter gene assay was employed to examine the effect of miR-216a on luciferase activity .MGC-803 cells were transfected with miR-216a mimics ,and next Western blotting was performed to detect the expression of PKCαprotein .The effects of PKCαdownregulation on cell proliferation and apoptosis were observed after PKCαsiRNA were transfected into MGC-803 cells .MGC-803 cell proliferation assays were performed when cotransfected with miR-216a mimics .Results The result demonstrated miR-216a could bind to the 3′UTR of PKCαand inhibited the luciferase activi-ty ,cut the 41% .PKCαprotein expressions were significantly down-regulated when miR-216a was overexpressed in MGC-803 .siR-NA-mediated downregulation of PKCα could suppress the potentials of cell proliferation and induce apoptosis .Conclusion miR-216a suppresses cell proliferation and induces apoptosis by targeting PKCαmRNA 3′UTR in gastric cancer .

Objective To explore the effects of 2,3,5,4'-tetrahydroxy stilbene-2-β-D-glycoside(TSG)on the over-expression and aggregation of α-synuclein in vitro.Methods TSG in different concentrations was incubated with α-synuclein transgenic COS-7 cells for 24 h.The cell viability was measured by MTT method.The expression of α-synuclein protein was determined by immunocytochemistry and Western blotting method.Results Incubation of TSG at the range of 12.5～200.0 μmol/L with α-synuclein transgenic COS-7 cells for 24 h did not influence cell viability,but a dose-dependently inhibition for the over-expression of α-synuclein protein could be observed in the tests of immunocytochemistry and Western blotting.Conclusion TSG can inhibit the over-expression of α-synuclein protein in COS-7 cells in vitro.

Antigens ; chemistry ; Fixatives ; chemistry ; Humans ; Hydrogen-Ion Concentration ; Immunohistochemistry ; methods ; Microwaves ; Staining and Labeling ; methods

Aged ; Antigens, CD20 ; analysis ; Gene Rearrangement ; Humans ; Immunoblastic Lymphadenopathy ; genetics ; metabolism ; pathology ; Immunoglobulin Heavy Chains ; genetics ; Immunohistochemistry ; Lymph Nodes ; metabolism ; pathology ; Lymphoma, T-Cell ; genetics ; metabolism ; pathology ; Male ; Polymerase Chain Reaction ; RNA, Viral ; analysis ; Receptors, Antigen, T-Cell, gamma-delta ; genetics ; Reed-Sternberg Cells ; metabolism ; pathology

Antigens, CD34 ; metabolism ; Cytokines ; metabolism ; Diagnosis, Differential ; Humans ; Immunohistochemistry ; Male ; Middle Aged ; Mucin-1 ; metabolism ; Perineum ; pathology ; Phosphopyruvate Hydratase ; metabolism ; Sarcoma ; metabolism ; pathology ; surgery ; Vimentin ; metabolism

Objective To analyze epidemiological characteristics of mitochondrial DNA12SrRNA A1555G mutation in Chinese populations with non-syndromic sensorineural hearing loss by the literature review and find the main actual deficiencies in course of epidemiological study.Methods From Cbmdisc and PUBMED database pulled out were all published epidemiological literatures about Chinese mtDNA12SrRNA A1555G mutation from 1996 to 2008.Reviewed were the primary data of these studies including the number of samples,demographic characteristics of the samples,mutation frequencies,interrelations between the mutation and aminoglycoside exposure and so on.Results 21 papers out of 25 were induded in this study.The patients had non-syndromic sensorineural hearing loss from 14 regions of China.A total of 3 473 were found including 230 patients with A1555G mutation and the average mutation frequency was 6.62%.The samples in each regions ranged from 72 to 802 and the reported mutation frequencies were from 0.67%-14.6%.The statistical discrepancy was significant among mutation frequencies in different regions by χ~2 test(P=0.0000).The number of patients with aminoglycoside antibiotics exposure was 739 including 100 with A1555G mutation in all literatures.The proportions in different regions were from 2.70% to 33.33% with the average of 13.53%.The average proportion was significantly higher than the mutation frequency in patients with non-syndromic sensorineural hearing loss.Conclusion Some deficiencies in epidemiological research Omutation in China included age,ethnic,and geographic bias,insufficiency of samples,inadequate randomization and so on.Researchers should focus with more efforts on the epidemiological characteristics of A1555G mutation in Chinese people.