[The pancreatic segmental classification and segmental resection of the head of the pancreas]

Based on embryologic anatomy and clinical practice, the pancreas can be divided into four segments: the posterior, anterior, medial, and distal segments. The embryologically termed ventral pancreas is now retermed the posterior segment. The posterior segment is drained by the duct of Wirsung, and the anterior segment is drained by the duct of Santorini. According to this segmental classification, independent resection of each segment can be performed systematically. This concept will contribute to establishing more ration and anatomic operative procedures. Recent anatomic study in autopsies has revealed a persistent embryologic fusion plane between the anterior and posterior segments. To establish new operative procedures based on to this pancreatic segmental classification, further investigations on the blood supply of each segment and the embryologic fusion plane are required.