Epithelioid Hemangioendothelioma Presenting as Necrotizing Pneumonia.

Epithelioid hemangioendothelioma (EHE) is a very rare vascular neoplasm that is often asymptomatic. A 40-year-old woman presented to the emergency department for evaluation of a nonproductive cough, chest pain, and dyspnea. A chest computed tomography angiography (CTA) demonstrated necrotizing pneumonia, a loculated left-sided pleural effusion, and an acute pulmonary embolus.

Rupture of a de novo dural AV fistula following adult cerebral AVM resection.

Acquired unruptured dural arteriovenous fistulas (DAVFs) have been described; however, ruptured de novo DAVFs remain exceedingly rare. We describe the case of a man in his 40s who presented with a recurrent intraparenchymal haemorrhage several years after angiographic cure of an intracranial arteriovenous malformation (AVM). Repeat angiography identified a new Cognard type IV DAVF anterior to the prior craniotomy.

Direct Synthetic Control over the Size, Composition, and Photocatalytic Activity of Octahedral Copper Oxide Materials: Correlation Between Surface Structure and Catalytic Functionality.

We report a synthetic approach to form octahedral Cu2O microcrystals with a tunable edge length and demonstrate their use as catalysts for the photodegradation of aromatic organic compounds. In this particular study, the effects of the Cu(2+) and reductant concentrations and stoichiometric ratios were carefully examined to identify their roles in controlling the final material composition and size under sustainable reaction conditions. Varying the ratio and concentrations of Cu(2+) and reductant added during the synthesis determined the final morphology and composition of the structures.