Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Dilated Pericardiacophrenic Vein in SVC Obstruction due to Small Cell Lung Cancer
- Radiologic Findings
- Contrast enhanced CT at the level of distal trachea shows an irregular mass lesion invading superior vena cava, and multiple collateral vessels in AP window including left superior intercostal vein and in the anterior chest wall.
CT scans at the level of ventricles and hepatic dome show intrathoracic course of pericardiacophrenic vein along left border of heart and its connection to inferior phrenic vein under diaphragm. Also noted are prominent azygos vein and collateral vessels in anterior chest wall.
- Brief Review
- The pericardiacophrenic vein drains the pericardium, pleura, and diaphragm and ascends along the left border of heart with the accompanying phrenic nerve between the mediastinal pleura and the pericardium. It drains into either the internal mammary vein or the left superior intercostal vein, or directly into the left brachiocephalic vein. Its diaphragmatic branches anastomose with those of inferior phrenic vein, which drains to the inferior vena cava or left renal vein. It could be a collateral pathway when either the superior or the inferior vena cava is obstructed. Grossly dilated pericardiacophrenic vein can cause the undulating shadow along the left cardiac border or at the cardiophrenic angle on chest radiographs.
- References
- 1. Godwin JD, Chen JTT. Thoracic venous anatomy. AJR 1986;147:674-684
2. Chung JW, Im JG, Park JH, Han JK, Choi CG and Han MC: Left paracardiac mass caused by dilated pericardiacophrenic vein: report of four cases. AJR 1993;160:25-28
- Keywords
- Mediastinum, Vascular, Vascular,