urinary tract obstruction kidney disorder hydronephrosis https://www.malacards.org/card/hydronephrosis EFO:0005562 NCIT:C26796 ICD9:591 MONDO:0005510 MEDGEN:42531 UMLS:C0020295 MESH:D006869 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. SCTID:43064006 DOID:11111