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Further less invasive treatments have been explored such as epidural saline, dextran 40 mg solutions, hydration, caffeine, sphenopalatine ganglion blocks, greater occipital nerve blocks, and surgical closure of the gap; all have shown promise. Further studies are essential to prove efficacy as well as safety over the proven treatment of epidural blood patches. There is still limited evidence in literature about the understanding of PDPH and optimal treatment.OBJECTIVES The aim of our study was to investigate the association between driver oncogene alterations and metastatic patterns on imaging assessment, in a large cohort of metastatic lung adenocarcinoma patients. METHODS From January 2010 to May 2017, 550 patients with stage IV lung adenocarcinoma with molecular analysis were studied retrospectively including 135 EGFR-mutated, 81 ALK-rearrangement, 47 BRAF-mutated, 141 KRAS-mutated, and 146 negative tumors for these 4 mutations (4N). After review of the complete imaging report by two radiologists (junior and senior) to identify metastatic sites, univariate correlation analyzes were performed. RESULTS We found differences in metastatic tropism depending on the molecular alteration type when compared with the non-mutated 4N group in the EGFR group, pleural metastases were more frequent (32% versus 20%; p = 0.021), and adrenal and node metastases less common (6% versus 23%; p  less then  0.001 and 11% versus 23%; p = 0.011). In the ALK group, there were more braiumors are unlikely to spread to bones and have a serous (pericardial ad pleural) tropism. • These correlations could help in the clinical management of patients with metastatic lung adenocarcinoma.OBJECTIVES To investigate the different CT characteristics which may distinguish influenza from 2019 coronavirus disease (COVID-19). METHODS A total of 13 confirmed patients with COVID-19 were enrolled from January 16, 2020, to February 25, 2020. Furthermore, 92 CT scans of confirmed patients with influenza pneumonia, including 76 with influenza A and 16 with influenza B, scanned between January 1, 2019, to February 25, 2020, were retrospectively reviewed. Pulmonary lesion distributions, number, attenuation, lobe predomination, margin, contour, ground-glass opacity involvement pattern, bronchial wall thickening, air bronchogram, tree-in-bud sign, interlobular septal thickening, intralobular septal thickening, and pleural effusion were evaluated in COVID-19 and influenza pneumonia cohorts. RESULTS Peripheral and non-specific distributions in COVID-19 showed a markedly higher frequency compared with the influenza group (p  0.05). CONCLUSIONS Though viral pneumonias generally show similar imaging features, there are some characteristic CT findings which may help differentiating COVID-19 from influenza pneumonia. KEY POINTS • CT can play an early warning role in the diagnosis of COVID-19 in the case of no epidemic exposure. • CT could be used for the differential diagnosis of influenza and COVID-19 with satisfactory accuracy. • COVID-19 had a patchy or combination of GGO and consolidation opacities with peripheral distribution and balanced lobe predomination.OBJECTIVES The aim of this study was to evaluate whether the orientation of the heart, measured as an angle between the long axis of the heart and ascending aorta midline (heart-aorta-angle, HAA), associates with ascending aortic (AA) dilatation. Furthermore, the association between HAA and wall shear stress (WSS) was studied. METHODS HAA was retrospectively measured in 1000 consecutive coronary artery computed tomographic angiography (CCTA) images in patients with low-to-moderate pretest probability for coronary artery disease (CAD). To evaluate the effects of HAA on AA flow, 4D flow MRI was performed for 28 patients with AA dilatation (> 40 mm) and WSS was analyzed. RESULTS The mean age of patients undergoing CCTA was 52.9 ± 9.8 years; 66.5% were women. Their median HAA was 128.7° and interquartile range 123.3-134.1°. find more HAA was significantly smaller in patients with dilated AA (median 126.7° [121.3-130.8°]) compared with the patients with normal AA (median 129.5° [124.3-135.3°], p  less then  0.001). HAA was smaller in males (p  less then  0.001) and in patients with diabetes (p = 0.016), hypertension (p = 0.001), CAD (p = 0.003), hypercholesterolemia (p  less then  0.001), and bicuspid aortic valve (p = 0.025) than without these factors. In a subpopulation without any of these underlying diseases (n = 233), HAA was still significantly smaller in the patients with dilated AA (median 127.9° [124.3-134.3°]) compared with patients with normal AA (median 131.9° [127.6-136.9°], p = 0.013). In 4D flow MRI, a smaller HAA correlated with increased total WSS in the outer curvature of the proximal AA (r = - 0.510, p = 0.006). CONCLUSION A smaller HAA associates with AA dilatation and affects the blood flow in the proximal AA. KEY POINTS • A smaller angle between the long axis of the heart and ascending aorta midline associated with ascending aortic dilatation. • A smaller heart-aorta-angle correlated with increased total wall shear stress in the outer curvature of the proximal ascending aorta.PURPOSE Perianastomotic fluid collection (PFC) is one of the postoperative complications of pancreaticoduodenectomy (PD). However, no studies have investigated the clinical significance of PFC location and volume during the early postoperative period. This study aimed to assess the association between PFC during the early postoperative period and postoperative complications. METHODS Medical records of 148 patients who had undergone PD and computed tomography (CT) on postoperative day 4 were retrospectively reviewed. The location-superior, inferior, ventral, dorsal, or splenic hilum-and PFC index, which is the estimated volume of fluid collection, were determined using CT. The associations between postoperative complication and the presence of PFC, and PFC index according to the location, were assessed. RESULTS The PFC group included 102 patients (69%). Postoperative pancreatic fistula (POPF) and organ/space surgical site infection (SSI) were more frequent in the PFC group (42% vs 9%, p  less then  0.001 and 29% vs 11%, p = 0.
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