urinary tract obstruction kidney disease hydronephrosis COHD:433811 Collection of urine in the renal pelvis that results in dilatation of the renal pelvis and calyces. It is caused by obstruction of urine flow, nephrolithiasis, or vesicoureteral reflux. Signs and symptoms include flank pain, nausea, vomiting, fever, and dysuria. DOID:11111 EFO:0005562 ICD10:N13.30 ICD9:591 MESH:D006869 MONDO:0005510 NCIT:C26796 SCTID:43064006 UMLS:C0020295