Fig. (1) Photograph of pancreas indicating the anterior inferior pancreaticoduodenal artery (aipd) covered by the lower portion (black *) of the pancreatic head (A), up from the lower portion (white *), appearance of AIPD (B). aspd, anterior superior pancreaticoduodenal artery; bp, body of the pancreas; cp, cauda of the pancreas; du, duodenum; ipd, inferior pancreaticoduodenal artery; sm, superior mesenteric artery; sp, spleen; up, uncinate process.