The "Heidelberg Triangle" is an anatomical area composed of Common hepatic artery (CHA), superior mesenteric artery (SMA) and superior mesenteric vein (SMV).
This area is considered to be the common site of recurrence after pancreatic surgery.
Recent studies have shown that TRIANGLE operation can improve the state of the cutting edge and has potential value in improving the prognosis. However, the data on recurrence and survival rate of pancreatic cancer and periampullary cancer after TRIANGLE operation are insufficient.
The aim of the present study is to evaluate the effect and safety of "Heidelberg Triangle" dissection combined with Pancreatoduodenectomy or Distal Pancreatectomy on the prognosis of pancreatic cancer and periampullary cancer .
