has part has part has_part characteristic of has modifier exocrine pancreatic insufficiency MPheno.ontology MP:0003335 inadequate synthesis and/or secretion of digestive enzymes by the exocrine portion of the pancreas, usually due to loss of acinar tissue from idiopathic atrophy or acute or chronic inflammation, causing maldigestion and malabsorption of nutrients abnormal exocrine pancreas physiology abnormal insufficient exocrine pancreas