Objective To study the imaging findings of atypical thymoma.Methods 16 patients with atypical thymomas confirmed by pathology were involved in this study.Results In 16 cases,the all tumors appeared as soft tissue masses in anterior mediastinum,other imaging findings included lobulated sign in 12,calcification with in the tumors in 9,directly invasion to adjacent fatty tissue in 13 and mediastinum pleural and anterior chest wall in 7.The ipsilateral mediastinum pleural planting in 8,vascular involvement in 7 and pleural effusion in 6,pericardium effusion in 3 were showed.The tumors with smooth margins and clear surrounding fatty tissue were seen in 3,that were really simulating the benign thymoma.Conclusion Atypical thymoma are of certain imaging characteristics.

Objective To assess the efficacy and safety of BioLiver Ⅰ bioartificial liver support system (BALSS) on the treatment of two types of acute liver failure (ALF) canine models. Methods The drug induced ALF canine model was established by multiple subcutaneous injections of acetaminophen. Another model was operated to resect 80 percent of the liver tissue. The primary hepatocytes were separated from the swine and cultured within the BALSS. The ALF models were treated by BioLiver ⅠBALSS for 6 hours. The changes of physiological, biochemical and histological parameters were observed before and after the treatment. Results The canines developed ALF 48 hours after injections of acetaminophen, the established rate of the model was 63 3%. While the other ALF canine model developed 24 hours after 80 percent liver resection and the established rate was 84 2%. Using our modified enzymatic digestion method, the yield of hepatocytes was (1 0～3 0)?10 10 per swine with high viability. BioLiver ⅠBALSS treatment resulted in beneficial effects on blood biochemical parameters. The pathological lesions of the liver were repaired. BALSS treatment was harmless to other organs. The ALF canines in drug group survived longer than in operation group. Conclusion This type of BALSS can provide safe and efficacious liver function support in the two types of ALF canine models, and it may be as an hepaful and important therapy to ALF

Pyk2(Proline-rich tyrosine kinase 2) is an important member of focal adhesion kinase family. Pyk2 is highly ex-pressed in the central nervous system and the hematopoietic sys-tem . Pyk 2 can trigger a variety of SH 2 domain-containing pro-
teins to phosphorylate their substrates, thus it can participate in the regulations including ion channel activation, stress response, cell adhesion, cytoskeleton reorganization, vesicle transport and so on. Through the regulations above, the ability of cell migra-tion, survival, proliferation changes accordingly, suggesting that Pyk2 in many important regulatory processes may become a tar-get for clinical effects. Current drug development for Pyk2 main-
ly focuses on cancer, osteoporosis and immune response. This review illustrates the domain structure, regulatory mechanisms, potential drug targets, and the drug development of Pyk2 based on the above three fields, which will provide a theoretical basis for clinical treatment.

Objective To evaluate the role of video-assisted thoracoscopic surgery (VATS) in the diagnosis and treatment of esophageal tuberculosis. Methods We had conducted video-assisted thoracoscopic surgery and acute pathological examinations for diagnosing and treating esophageal tuberculosis in 8 patients from June 1996 to April 2004. Results All the 8 patents were clarified as having secondary esophageal tuberculosis (Six of them had been misdiagnosed as having esophageal tumors preoperatively). A lymphoidectomy was carried out in 5 patents and a focus debridement, in 3 patents. The duration of procedure was 30~50 min (mean, 45 min). The intraoperative blood loss was 50~100 ml (mean, 80 ml). Postoperatively, pleural effusion occurred in 2 patients and wound infection took place in 1. Follow-up for 5~27 months (mean, 15 months) in 7 patients revealed a remarkable relief of dysphagia and no recurrence. Conclusions VATS in combination with acute pathological examinations is a rapid, safe, accurate and minimally invasive alternative for the diagnosis and treatment of esophageal tuberculosis.

Objective To investigate clinical effects of arthroscopic synovectomy combined with radiofrequency vaporization for the treatment of rheumatoid synovitis of the knee joint.Methods In 36 cases of rheumatoid gonarthritis with chronic synovitis of the knee joint,with simultaneous administration of regular medication,we had applied arthroscopic synovectomy combined with radiofrequency vaporization to remove the hyperplastic synovium and pannus through standard anteromedial and anterolateral approaches, and superolateral and superomedial approaches.In 21 out of 36 cases,diseased synovium in the posterior compartment was resected via additional posteromedial and posterolateral approaches.A systematic rehabilitation program was practiced 3 days after operation. Results All the 36 cases were followed for 4~26 months(mean,16 months).Clinical effects evaluation showed "excellent" in 21 cases,"good" in 13 cases,and "fair" in 2,with a total excellent-or-good rate of 94.4%(34/36).The knee joint function scores were significantly elevated from 58.6?5.3 preoperatively to 91.6?5.8 postoperatively(t=2.723,P=0.003).The Lysholm scores were significantly elevated from 42.3?3.8 preoperatively to 90.2?4.4 postoperatively(t=2.437,P=0.001).Conclusions Combined use of arthroscopic synovectomy with radiofrequency vaporization for the treatment of rheumatoid gonarthritis has advantages of minimal trauma,little blood loss,and rapid recovery of joint function.The procedure can effectively control the progression of rheumatoid arthritis and restore the knee joint function to the greatest possible extent.

Glenohumeral subluxation is one of the most frequent complications in patients with post-stroke hemiplegia. This paper reviewed the recent advances in research on post-stroke Glenohumeral subluxation from the epidemiology, pathogenesis and related factors, diagnosis,treatment and so on.

Probing into the methods and techniques of physician-patient communication is important to clinic medicine and medical education. Physician- patient shared decision is one of important aspects of physician-patient communication, 80 patients with hematologic malignancies were reviewed for classification of models of medical decision making, and the methods and techniques of physician-patient shared decision were also discussed .

Objective To compare the curative effect of perindopril and metoprolol in the treatment of diabetic patients with asymptomatic cardiac insufficiency.Methods According to the method of random numbers, 152 diabetic patients with asymptomatic cardiac insufficiency were divided into the observation group and control group,with 76 cases in each group.The observation group was given with perindopril treatment,while control group was given with metoprolol treatment.The cardiac function index,glycosylated hemoglobin,BNP levels,the incidence of cardiac insufficiency and the occurrence of adverse drug reactions before and after treatment were compared.Results There were no significant differences in LVEF,Tei index and E/A between two groups before treatment (all P >0.05 ).Compared with before treatment,the cardiac function indexes of the two groups were significantly improved after treatment(t=5.96,4.83,4.91,10.22,5.68,5.18,all P<0.05),but the observation group were improved more significantly(t=5.64,4.67,5.03,all P<0.05).Before and after treatment,there was no significant difference in the levels of glycosylated hemoglobin(all P>0.05),and the difference between the two groups was not statistically significant(all P>0.05).The BNP levels of the observation group before and after the treatment were (515.43 ± 58.85)pg/mL and (214.43 ±32.42)pg/mL respectively,of which the control group were (513.94 ±59.11)pg/mL and (263.32 ±43.31)pg/mL respectively,and after treatment,the BNP levels of the two groups were significantly decreased(t=23.45,17.68,all P<0.05),of which the observation group decreased more obvious(t=6.97,P<0.05).The cardiac insufficiency incidence of the observation group was 3.95%,which was significantly lower than 14.47% of the control group(χ2 =5.03,P<0.05).The incidence of adverse drug reactions had no obvious differ-ences in both groups(χ2 =0.08,P>0.05).Conclusion Using perindopril in treatment of diabetic patients with asymptomatic heart function can obviously improve cardiac function,reduce the incidence of BNP and cardiac insuffi-ciency.It has the clinical curative effect and high safety.

BACKGROUND: Treating vascular image of eye fundus is a prerequisite for quantitative analysis; however, practical operation is so restricted by equipment, noise and current that results of image are not ideal; therefore, it is necessary for image to improve its contrast.OBJECTIVE: To search an ideal way to regulate contrast of image.DESIGN: Compared analysis.SETTING: Department of Instrument, Daping Hospital affiliated to the Third Military Medical University of Chinese PLA; Fuyang Cancer Hospital.METHODS: To introduce two ways for regulatiug contrast of image, including exponential curve method and red-deepening dichroism technique;meanwhile, controllable parameters are also analyzed.RESULTS: After process of exponential curve, contrast near by gray value at the center of image changed greatly, and gray value near by 0 point did uot reach 0 value, this suggested that image was not of deformation. However, during dichroism operation, light cyanine was observed at light color region at the phase of red-deepening because of decreasing red quantity.Parameters of horizontal movement presumed as 0 were used to analyze results mentioned above.CONCLUSION: It is better effect of exponential curve method on improving contrast of image of eye fundus.

Chemokines play pleiotropic roles in the pathology of Alzheimer′s disease(AD),a chronic inflammatory disease of central nervous system.The neuropathological features of AD include neurofibrillary tangles,amyloid plaques,neuroinflammation,and neuronal synaptic loss.Chemokines are involved in the pathogenesis of AD by activating or regulating inflammatory cells or glial cells,playing dual key roles of the pro-and anti-inflammatory properties in AD.The levels of chemokines in serum,cerebrospinal fluid and brain tissue of AD patients are changed accordingly.This review summarizes the role of chemokines and their receptors in AD in the biological activities and unveils the changing rules,aiming to provide new strategies for clinical treatment of AD.