“…Patients with hydromediastinum, which is often accompanied by hydrothorax, have symptoms such as chest pain, dyspnea, nausea, vormitus, and hypotension. [5][6][7][8][9][10][11][12][13][14] Plain radiographic examination shows a widened mediastinum with or without a misplaced central venous catheter. 5,7,8,10-14 Contrast medium injec- tion via the central venous catheter can reveal abnormal location of the catheter tip and extravasation of the contrast medium into the mediastinum.…”