“…Although mediastinal aneurysms may manifest as a mediastinal mass, acute superior vena cava obstruction, dysphagia, hemothorax, hemomediastinum, and hematemesis can occur [6]. The primary diagnostic modes are computed tomographic angiography, intra-arterial angiography and, occasionally, magnetic resonance imaging in confusing cases [8]. In patients with symptoms of chest pain, mediastinal hemorrhage, and hemothorax, enhanced CT should be performed to detect the bleeding point before treatment.…”