Is r0 but not R1/R2 resection associated with better survival than palliative photodynamic therapy in biliary tract cancer?
In this large UK series of BTC, palliative PDT resulted in survival similar to those with curatively intended R1/R2 resections. Surgery conferred a survival advantage only in patients with R0 resection margins, emphasising the need for accurate pre-operative staging.
Despite some sociodemographic, clinical, and paraclinical differences in the presentation of these TND, there is no feature accurately distinguishing between TIA and TND associated with migrainous phenomena when validated actual criteria are used, leading to probable confusion in most studies. There is a need to develop reliable criteria and/or tests for this purpose.