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Abstract: Primary angiosarcoma of the spleen is rare, usually widespread or has a splenic rupture by the time of presentation, and almost always has poor prognosis; early radiological diagnosis is necessary for improving the survival rate. We report two special cases of this disease. Both patients did not have pathologic metastasis or splenic rupture, but their computed tomography (CT) manifestations were distinct from each other and had uncommon characteristics. We compared the CT features with pathological findings. [Copyright &y& Elsevier]

Abstract: Aim: To illustrate the MDCT features of hepatic paragonimiasis and correlate the results with clinicopathological findings. Materials and methods: Eighteen patients (8 male, 10 female; mean age 37years) with hepatic paragonimiasis were included in this study. MDCT features of their hepatic lesions were retrospectively reviewed and correlated with clinicopathological findings. Results: All patients were lifelong residents in endemic areas of paragonimiasis, especially Paragonimiasis skrjabini variety. Abdominal pain or discomfort, fever and high eosinophil percentage were the predominant clinical features. In total, 21 lesions were detected on MDCT images, 18 (85.7%) directly contacted the hepatic capsule and 3 (14.3%) were adjacent to the capsule. Segment V (26%), VIII (26%) and VI (18.5%) were the most commonly involved sites. Sixteen lesions (76%) were conglomerated cystic or multilocular and 5 (24%) were solid. On plain MDCT scan, the margin and internal detail of the lesions were not clear except for one cystic variety, while they were clearly demonstrated on enhanced images. Single or multiple cysts with different diameters were commonly detected in the non-solid lesions, and some of them were mutually connected with tortuous tract formation. Among the solid lesions, 2 and 3 showed tubular and homogeneous enhancement, respectively. Conclusion: Peripherally distributed lesions, mutually connected cysts with tortuous tract formation, and tubular enhancement, which may be closely associated with the infection route and migration of the worm, could be seen as the main MDCT features of hepatic paragonimiasis. [Copyright &y& Elsevier]

Abstract: Interrupted aortic arch (IAA) is a rare congenital cardiovascular condition. A patient with uncorrected IAA accompanied by rich collateral arteries can survive to adulthood asymptomatically. However, IAA complicated by aortic dissection is life threatening. Herein, we report a rare case of an isolated IAA accompanied by type B aortic dissection and extensive collateral arteries detected by multidetector computed tomography in a 38-year-old man. The imaging findings of the case are presented, and the utility of multidetector computed tomography in the evaluation of this condition is discussed. [Copyright &y& Elsevier]

Abstract: Detailed knowledge of pulmonary vein (PV) anatomy is essential for successful radiofrequency catheter ablation. The purpose of this study was to evaluate the anatomy of pulmonary veins (PVs) by using dual-source computed tomography (DSCT). 57 patients with and 53 subjects without atrial fibrillation underwent DSCT examination. PV variations were more common in patients than those in subjects (29.8% vs. 13.2%). Early branching occurred more often with right than with left PVs (P <0.01). Size of superior and right PVs ostia was larger than that of inferior and left PVs in patients and subjects (P <0.01), respectively. The ostia of right PVs were more round than those of left PVs (P <0.01). For each PV, the 95% confidence intervals of spatial angles were rather narrow. In conclusion, the variations, ostial size and shape and spatial orientation of PVs could be precisely visualized and adequately evaluated by DSCT. [Copyright &y& Elsevier]