cystic kidney disease medullary sponge kidney https://rarediseases.info.nih.gov/diseases/232/medullary-sponge-kidney https://www.malacards.org/card/medullary_sponge_kidney Orphanet:1309 GARD:0000232 MEDGEN:5970 MESH:D007691 NANDO:2200173 UMLS:C0022681 MedDRA:10027104 Medullary sponge kidney (MSK) is a birth defect of the tubules - tiny tubes inside the kidneys. In a normal kidney, urine flows through these tubules as it is being formed. In MSK, tiny sacs called cysts form in the medulla (the inner part of the kidney), creating a sponge-like appearance. The cysts keep urine from flowing freely through the tubules. MSK is present at birth but symptoms typically do not occur until adolescence or adulthood. Problems caused by MSK include blood in the urine, kidney stones, and urinary tract infections. MSK rarely leads to more serious problems, such as total kidney failure. There is no cure for this condition, so treatment is aimed at removing kidney stones and treating urinary tract infections with antibiotics. MONDO:0015268 Precalicial canalicular ectasia SCTID:236443009 icd11.foundation:1723148250 MSK Cacchi Ricci disease Precalyceal canalicular ectasia Cacchi-Ricci syndrome NCIT:C34751 sponge kidney cystic dilatation of renal collecting tubes ICD9:753.17 NORD:1421 Cacchi-Ricci disease disorder of development or morphogenesis