abnormal kidney medulla morphology kidney cyst kidney medulla cyst renal medullary cyst renal medullary cysts MP:0011307 csmith kidney medulla cysts cystic kidney medulla renal medulla cyst cystic renal medulla renal medulla cysts presence of one or more abnormal membranous sacs in the kidney medulla 2011-10-11T04:18:37Z MPheno.ontology renal medulla cyst