calculated pancreatic islet area ratio of insulin-positive cell area to total area of duodenal region of pancreas 2013-10-04T16:52:04Z A calculated measurement in which the value representing the two-dimensional extent of the part(s) of the head region of the pancreas (that is, the portion of the pancreas which lies closest to the duodenum, the first segment of the small intestine) in which insulin, the major, fuel-regulating peptide hormone that promotes storage of glucose and inhibits lipolysis and gluconeogenesis, can be detected is divided by the value representing the entirety of the two-dimensional extent of the head region of the pancreas, and presented as a ratio, fraction, quotient or percentage. The pancreas is the elongated, racemose gland containing both endocrine and exocrine elements which secretes hormones such as insulin and glucagon internally and digestive enzymes externally. CMO:0001813 clinical_measurement_ontology jsmith ratio of IPCA to total area of duodenal region of pancreas ratio of IPCA to total area of pancreas head region ratio of duodenal IPCA ratio of insulin-positive cell area to total area of head region of pancreas