abnormal kidney papilla morphology kidney papillary atrophy MPheno.ontology acquired diminution of the size of the apex (tip) of a renal pyramid associated with wasting as from death and reabsorption of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes MP:0011304 csmith 2011-10-11T04:08:05Z atrophied kidney papilla renal papillary atrophy renal papilla atrophy