The pancreas, a retroperitoneal organ that performs a range of both endocrine and exocrine functions, lies within the curve of the first, second, and third parts of the duodenum (i.e., the C loop) and extends across the posterior abdominal wall behind the stomach to the splenic hilum. It is divided into four parts (head, neck, body, and tail) and one accessory lobe, the uncinate process (Fig. 1) (Strandring 2005).
KeywordsSuperior Mesenteric Artery Plan Target Volume Clinical Target Volume Superior Mesenteric Vein Stereotactic Body Radiation Therapy
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