[Imaging aid for thoracoscopic thymectomy; thymic vein visualization].

The spread and progress of thoracoscopic surgery has been remarkable. There are many important organs and blood vessels in the mediastinal space, thus, as inadvertent injury invites serious consequences, it is necessary to understand the anatomical position of existing structures. When enucleating the thymoma under a thoracoscope, one of the blood vessels to be careful about is the thymic vein. Therefore, we examined whether the thymic vein could be confirmed using a multidetector-row computed tomography (MD CT). We believed we could understand the anatomical position of the thymic vein by analyzing the high resolution slice data provided in MD CT using a work station. The diameter of the thymic is from a little less than 1 mm to 3 mm, and there were individual variations in position and the number of the vein. The thymic vein flowed into the left brachiocephalic vein in many cases. In some cases, the thymic vein flowed into the right internal thoracic vein or superior vena cava. It appears that visualization of the thymic vein could provide useful data when performing thoracoscopic thymectomy.