For ablative treatment of intrahepatic cholangiocarcinoma, what dose constraints do you recommend for the IVC when the tumor is adjacent to it?  

The IVC is the lowest pressure vessel in the body, is thin walled, and not susceptible to pseudoaneurysm or atherosclerosis. According to the evidence and my experience, you can give way more than it takes to control any tumor to any vein. There has never been a venous complication related to radiat...