Objective:To investigate the changes of radiosensitivity and growth features of the surviving progeny from the irradiated bile duct cancer cells.Methods:To cultivate human bile duct cancer cell and the progeny of irradiated bile duct cancer,population doubling time(PDT),plating efficiency(PE),radiosensitivity index SF2 and the detection of bile duct cancer cell lines.Results:The PDT of bile duct cancer was (120.0?2.8)hrs,PE(14.0?0.6)%,SF2 0.62?0.05.The PDT of the irradiated bile duct cancer cells was(152.8?11.2) hrs (t=3.124,P

Objective To analyze the CT, especially HRCT appearance of localized organizing pneumonia. Methods The CT scans of nine patients with histologically proved localized organizing pneumonia were studied retrospectively. Results The size of the lesions in nine cases varied from 2 to 4 cm( average 2.5 cm). Eight lesions were located in the peripheral lung parenchyma near the pleural surface. The lesions were detected as round in four, anomaly in five. The margin of six lesions had inward bow indentation. Infiltrating lesions in surrounding structures were found in four cases. Conclusion The CT, especially HRCT appearance of localized organizing pneumonia shows some features that can make most of them to be differentiated from other lesions.

Objective To study the value of expression of carcinoma-associated antigens in early diagnosis and prediction of prognosis of gallbladder carcinoma. Methods The expression of PCNA, CEA, CA50 and E-cad were detected by immunohistochemistry in 50 cases of gallbladder carcinoma, 10 gallbladder adenomas and 10 cholecystitis. Results The positive rates of CEA, CA50 and PCNA LI in gallbladder carcinomas were significantly higher than that of gallbladder adenomas and cholecystitis(P

Objective To investigate the clinical presentation, morphological features, immunohistochemical staining of the gastrointestinal stromal tumor (GIST), and its histogenesis as well. Methods The morphologic characteristics of GISTs were studied in 58 cases using light microscopy. The expression of c-kit(CD117), CD34 and vimentin were detected in all of the cases with EnVision staining. Results Among 58 cases of GISTs, 41 were spindle cell type, 5 epithelioid cell type and 12 mixture type, equivalent to 86.6 %(58 of 67) of all of the mesenchymal tumors of gastrointestinal tract admitted in the same period. The epithelioid cell type tumors were mainly composed of the epitheloid cells, predominantly short spindle, oval or round in pattern, with an overall eosinophilic cytoplasm by hematoxylin-eosin stain. Focal cytoplasmic vacuolization was often seen. Sometimes signet-ring like cells and cells with a clear cytoplasm were seen in the epithelioid stromal tumor. The tumor cells arranged in interlacing fascicles forming whorls or sometimes cell clusters. All of the 58 stromal tumors were strongly positive for vimentin (100 %), 55 out of 58 tumors positive for CD117 (94.8 %) and 46 out of 58 positive for CD34(79.3 %). Some cases also expressed SMA, actin, S-100 and MBP. Conclusions GISTs were the most common mesenchymal tumor seen in the gastrointestinal tract. Under light microscope, the morphology of stromal tumors sometimes looks like a leiomyoma or Schwannoma. The application of immunohistochemical markers (particularly CD117 and CD34) is considered necessary for the differential diagnosis. GISTs may originate from the pluripotential precursor cells like the interstitial cells of Cajal.

Objective To investigate the diagnostic value of hysteroscopy in patients with abnormal uterine bleeding.Methods The clinical data of 547 cases of abnormal uterine bleeding were analyzed retrospectively.The diagnostic curettage was conducted after hysteroscopy,the specimens were examined by histopathology,the detection result of hysteroscopy and histopathological were compared.Results The sensitivity of hysteroscopy in diagnosed abnormal uterine cavity lesions was 95.83％ (161/168),the specificity was 97.63％ (370/379),the false positive rate was 2.37％ (9/379),the false negative rate was 4.17％ (7/168),the positive predictive value was 94.71％ (161/170),the negative predictive value was 98.14％ (370/377),the Jorden index was 0.934.Hysteroscopy diagnosis showed that the endometrial polyps was 54 cases,the pathological diagnosis coincidence rate was 79.63％ (43/54);93 cases of simple hyperplasia,the pathological diagnosis coincidence rate was 90.32％ (84/93);16 cases of atypical hyperplasia,the pathological diagnosis coincidence rate was 87.50％ (14/16);4 cases of differentiated endometrial adenocarcinoma,the pathological diagnosis coincidence rate was 100.00％ (4/4);2 cases of uterine papillary serous carcinoma,the pathological diagnosis coincidence rate was 100.00％ (2/2);1 case of transitional cell carcinoma of endometrium,the pathological diagnosis coincidence rate was 100.00％ (1/1).Conclusion Hysteroscopy can visually observe the morphology of cervical canal and uterine cavity,the diagnostic rate of endometrial polyps,simple hyperplasia,atypical hyperplasia and endometrial carcinoma are higher,so it has important clinical value in the diagnosis of abnormal uterine bleeding.

Objective To investigate the molecular mechanism of the glucocorticoid?induced osteoblasts apoptosis,and to develop the effective intervention measures. Methods The MC3T3?E1 cells were treated with different concentrations of dexamethasone for 24 hours,then the apoptosis rate was detected with TUNEL analysis,the intracellular expression of Bim and Bax were determined by Westen blot. In addition,MC3T3?E1 cells were randomly divided into Bim?siRNA group,negative control siRNA group and control group. Twenty?four hours after transfection,10-4mmol/L dexamethasone was added to each group of cells for another 24 hours administration. The apoptosis rate was analyzed using the TUNEL,the mito?chondrial transmembrane electric potential was detected by flow cytometry after JC?1 staining,the expression of Bax,Bcl?2 in mitochondrial and Cyt?C,AIF in cytosolic were determined by Western blot. Results The rate of osteoblast apoptosis and Bim expression in cells were both significantly in?creased with the dosage of dexamethasone,there was no significant difference between the groups in the expression of Bax;the rate of osteoblast apop?tosis after the expression of silence Bim was significantly lower than the negative control siRNA group and control group,the expression of Bax and Cyt?C,AIF in cytosolic were significantly reduced,and the mitochondrial transmembrane electric potential was increased. Conclusion Bim is the key molecules in hormone?induced apoptosis of osteoblasts ,the expression of silence Bim can inhibit dexamethasone induced osteoblasts apoptosis through the mitochondrial pathway.

Objective To evaluate the ability of the artificial pneumothorax CT examination in detection and diagnosis of pleural metastatic tumor.Methods A retrospective study of 14 patients with pleural effusion using artificial pneumothorax CT examination was conducted.Results Six of the 14 patients were found to have a nodule or nodules on the pleura.The pleural metastatic tumors of 3 cases were from the lung cancers and another 3 from breast cancers were proved histologically.Conclusion The artificial pneumothorax CT examination is a effective and simple method in detecting of pleural metastatic tumor.

To better understand the drugs, frequency and other factors involved in the drug-induced renal failure, 227 cases of renal failure reported in the Chinese medical and pharmaceutical journals were statistically analyzed. Our results showed that the drugs that tend to cause renal failure are antibiotics, involving 80 cases, followed by antituberculosis agents(38 eases)and dehydration agents. Gentamycin (47 cases) and rifrimactane(36 cases) were among the drugs with highest incidence. There were 58 cases of death due to drug-related renal failure.

Objective To study the clinical, pathological and immunohistochemical characteristics of gastrointestinal stromal tumors (GISTs). Methods 87 cases of GISTs were studied with conventional histopathological and immunohistochemical stains. Results All patients were adults, age range 28 to 73 years (mean 53 year), the tumors were situated in stomach (56 cases), in small intestine (29 cases), in colon (2 cases). The tumors had two kinds of cells: spindle cells and epithelioid cells, they were different in proportion. Immunohistochemically, vimentin were all positive, CD117 and CD34 showed diffuse strong expression, SMA and S-100 were positive when the tumors differentiated to smooth muscle and nerve. Conclusion GISTs predominantly occurred in middle aged or old patients, the tumors were composed of spindle cells and epithelioid cells. The immunohistochemical characters were positive for CD117 and CD34.

Objective To compare the diagnostic value of PET-CT and bone scintigraphy in bone metastases. Methods Thirty-two patients with malignant neoplasm confirmed by pathology were undergone18F-FDG PET-CT and bone scan within two weeks.The sensitivity,specificity and accuracy of PET-CT and bone scan in detecting the focus were compared at the same scan filed.Results The diagnostic sensitivity,specificity and accuracy with PET-CT were 94.9%,91.7% and 94.1%,respectively,and 96.2%,54.2% and 86.3% with bone scan,respectively.18F-FDG PET-CT and99Tcm-MDP bone scan were the same in detecting metastatic tumor of bone,but the specificity of18F-FDG PET-CT was better than99Tcm-MDP bone scan in detecting bone metastasis.Conclusion Compared with99Tcm-MDP bone scan,18F-FDG PET-CT is more specific and helpful in detecting bone metastases.