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This study was conducted to establish long-term outcome in an unselected group of children with antenatally detected UTD.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>Seventy-one out of 103 children born in 2003\u20132005 and diagnosed with antenatal UTD agreed to participate in a 12\u201315-year follow-up including blood and urine samples, a kidney ultrasound exam, and kidney scintigraphy. The records were searched for previous urinary tract infections.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>Among children with an anteroposterior diameter (APD) \u2264\u20097\u00a0mm and no calyceal, kidney, ureteral, or bladder pathology in the early postnatal period, no one tested had\u00a0reduced estimated glomerular filtration rate (eGFR), albuminuria, or UTD at the follow-up at a mean age of 13.6\u00a0years. One child had kidney damage not affecting kidney function. Among children with postnatal APD &gt;\u20097\u00a0mm and\/or kidney, calyceal, ureteral, or bladder pathology, 15% had persistent UTD and 32\u201339% (depending on the method used) had kidney damage. Major postnatal urinary tract ultrasound abnormalities and a congenital anomalies of the kidney and urinary tract (CAKUT) diagnosis were factors associated with an increased risk for permanent kidney damage (odds ratios 8.9, <jats:italic>p<\/jats:italic>\u00a0=\u00a00.016; and 14.0, <jats:italic>p<\/jats:italic>\u00a0=\u00a00.002, respectively). No one had reduced eGFR. One child (1\/71, 1%) had a febrile urinary tract infection after the age of 2.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>We conclude that in children with postnatal APD \u2264\u20097\u00a0mm, no calyceal dilatation, normal bladder, ureters, and kidney parenchyma, the outcome is excellent. There is no need for long-term follow-up in these patients.<\/jats:p>\n<\/jats:sec>","DOI":"10.1007\/s00467-020-04659-4","type":"journal-article","created":{"date-parts":[[2020,6,23]],"date-time":"2020-06-23T23:05:20Z","timestamp":1592953520000},"page":"2129-2135","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Antenatally detected urinary tract dilatation: a 12\u201315-year follow-up"],"prefix":"10.1007","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3306-2235","authenticated-orcid":false,"given":"Maria","family":"Herthelius","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rimma","family":"Axelsson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karl-Johan","family":"Lidefelt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2020,6,23]]},"reference":[{"key":"4659_CR1","doi-asserted-by":"publisher","first-page":"661","DOI":"10.1016\/j.clp.2014.05.013","volume":"41","author":"DB Liu","year":"2014","unstructured":"Liu DB, Armstrong WR 3rd, Maizels M (2014) Hydronephrosis: prenatal and postnatal evaluation and management. 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