Q.STATIC呼吸门控与非门控扫描肺结节的临床价值:65例前瞻性研究

目的比较Q.STATIC呼吸门控（QSRG）与非门控(UG)扫描对肺结节图像质量、定量分析的影响，评价其临床应用价值。方法本项前瞻性研究纳入2019年11月~2020年5月疑诊肺结节且同意行QSRG采集患者65例，共295个肺结节，有4例患者因持续呼吸不规律未能完成门控检查而排除。记录QSRG和UG下可测量肺结节的最大标准摄取值（SUV_max）、肿瘤代谢体积（MTV）、平均标准摄取值（SUV_mean）、主动脉弓标准差值和临床扫描时间。比较QSRG和UGPET在肺结节检出、可测量肺结节、SUV_max、MTV、信噪比（SNR）和临床扫描时间的差异。结果QSRGPET和UGPET的PET肺结节检出肺结节数、可测量肺结节数、SUV_max、MTV、SNR和扫描时间分别为295个vs 275个、196个vs 182个、6.90±4.40g/mL vs 6.64±4.28g/mL（P < 0.05）、3.23±8.01cm3 vs 3.44±8.66cm3（P < 0.05）、30.30±20.91 vs 30.22±21.97（P>0.05）、16.45±3.74min vs 13.21±3.98min（P < 0.05），单个床位QSRG增加全身扫描的时间为3min。结论QSRG不增加放射性剂量，与UG图像相比，QSRG图像肺结节检出率和可测量能力更高，SUV_max和MTV定量分析更准确，稍有所增加总扫描时间。      

Hemostatic Markers as Predictors of Massive Blood Transfusion in Orthotopic Liver Transplantation

BackgroundThe aim of this study was to determine which standard preoperative laboratory results correlate to intraoperative transfusion requirement during orthotopic liver transplantation (OLT).Materials and MethodsWe retrospectively analyzed data from 305 adult patients who underwent OLT between 2009 and 2013 using laboratory results: International Normalization Ratio, platelet count, fibrinogen, and hemoglobin and total blood transfusion requirements (group L ≤ 1 L, group M > 1 L). All statistical analyses were conducted using the Statistical Package for Social Sciences software (IBM Corp. Released 2012. IBM SPSS for Windows, Version 21.0; IBM Corp., Armonk, NY, United States).ResultsWe found a positive correlation with hemoglobin and fibrinogen using multivariate analysis (P < .001). The receiver operating characteristic analysis in favor of total blood replacement > 1 L has shown a correlation with fibrinogen (cut-off value of 2.3 g/L, sensitivity of 85.8%, and specificity of 37.4%) and hemoglobin (cut-off 111 g/L, sensitivity of 69.9%, and specificity of 71.6%).Discussion and ConclusionThis study has confirmed that preoperative fibrinogen and hemoglobin level, but not International Normalization Ratio and platelet count, are indicators of potential massive perioperative blood loss during OLT and that within our patient cohort a cut-off fibrinogen value of 2.3 g/L and Hb level of 110g/L can predict a blood replacement of >1 L.     

The chemokine CXCL9 expression is associated with better prognosis for colorectal carcinoma patients

The chemokine CXCL9 has been demonstrated to play an important role in the development of human malignancies. However, its prognostic significance in cancer patients remains unclear and less is known about its role in colonrectal carcinoma (CRC) patients. In this study, we found that the relative mRNA expression level of CXCL9 in primary colorectal tumor tissues was significantly higher than that in corresponding normal colon tissues. CXCL9 protein expression was also detected in 102 of 130 primary CRC patients by immunochemistry. Thus, CXCL9 might play a vital role in the progression of colorectal cancer. By analyzing the correlation between clinicopathological factors of patients and expression of CXCL9 protein, we showed that the expression of CXCL9 was significantly associated with tumor differentiation, tumor invasion, lymph node metastasis, distant metastasis, and vascular invasion, but not with other factors of CRC patients including age, gender, tumor location and tumor size. Furthermore, by performing Kaplan–Meier method as well as Cox’s univariate and multivariate hazard regression model, we found that the higher the CXCL9 expression, the higher overall survival rate was observed, and CXCL9 expression was a significant independent prognostic factor for CRC patients. Therefore, CXCL9 is a useful predictor of better clinical outcome in CRC patients.     

17q21.31 Microdeletion associated with infantile spasms

Patients with 17q21.31 microdeletions frequently have neurologic abnormalities, especially seizures. This report is of a child with a deletion in this location who developed infantile spasms, a seizure type not specifically described in this syndrome. FISH analysis of parental blood metaphases demonstrated that the deletions occurred de novo. The deleted region encompasses the previously defined critical region for the 17q21.31 microdeletion syndrome, and includes the gene encoding for corticotropin-releasing hormone receptor 1, a protein implicated in hyperexcitability, and potentially in infantile spasms. Treatment with ACTH led to spasm cessation, consistent with its expected repression of CRH levels, which should be augmented by CRHR1 deletion, although this response was transient.