abnormal exocrine pancreas morphology exocrine pancreas atrophy acquired diminution of the size of the acinar gland portion of the pancreas that secretes digestive enzymes, associated with wasting as from death and reabsorbtion of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes atrophic exocrine pancreas MPheno.ontology MP:0009164 pancreas atrophy