PTH and Hypercalcemia: The development of pancreatitis may be related to the following mechanisms: (i) hypercalcaemia increases the calcium concentration in the pancreatic fluid and promotes the secretion of trypsinogen; (ii) it causes pancreatic stones to obstruct the pancreatic ducts; (iii) it accelerates the conversion of trypsinogen into trypsin, which attacks the pancreatic parenchyma and pancreatic ducts; and (iv) elevated levels of PTH cause pancreatic microthrombi, which can directly damage the pancreas [5].