Figure 3.

(a) Allen Oldfather Whipple (Reprinted with permission from Dr Richard J. Bing). (b) First two-stage operation as described by Whipple in his original report in 1936.⁶ (c) Antecolic anastomosis with the loop of the jejunum in a one-stage procedure¹¹ (Reprinted with permission from Elsevier. Originally published in Whipple AO. Observations on radical surgery for lesions of the pancreas. Surg Gynecol Obstet 1946; 82: 623–631). (d) Antecolic or retrocolic anastomosis with the vertical limb of a resected jejunum in a one-stage procedure¹¹ (Reprinted with permission from Elsevier. Originally published in Whipple AO. Observations on radical surgery for lesions of the pancreas. Surg Gynecol Obstet 1946; 82: 623–631)