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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Pediatric Surgery, Anesthesia and Intensive Care</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Pediatric Surgery, Anesthesia and Intensive Care</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский вестник детской хирургии, анестезиологии и реаниматологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2219-4061</issn><issn publication-format="electronic">2587-6554</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1245</article-id><article-id pub-id-type="doi">10.17816/psaic1245</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">A rare variant of obstruction of the pyeloureteral segment of the lower half in a child with doubling of the upper urinary tract: Сase report</article-title><trans-title-group xml:lang="ru"><trans-title>Редкий вариант обструкции пиелоуретерального сегмента нижней половины у ребенка с удвоением верхних мочевыводящих путей: клиническое наблюдение</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9145-8671</contrib-id><contrib-id contrib-id-type="spin">2155-5534</contrib-id><name-alternatives><name xml:lang="en"><surname>Sizonov</surname><given-names>Vladimir V.</given-names></name><name xml:lang="ru"><surname>Сизонов</surname><given-names>Владимир Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med.), Professor, Department of Urology and Human Reproductive Health with Pediatric Urology and Andrology Courses, Chief, Pediatric Urology and Andrology Division</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент, профессор кафедры урологии и репродуктивного здоровья человека с курсом детской урологии-андрологии; заведующий детским уроандрологическим отделением</p></bio><email>vsizonov@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8634-6453</contrib-id><contrib-id contrib-id-type="spin">8427-8260</contrib-id><name-alternatives><name xml:lang="en"><surname>Shidaev</surname><given-names>Askhab Kh.-A.</given-names></name><name xml:lang="ru"><surname>Шидаев</surname><given-names>Асхаб Хож-Ахмедович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Pediatric Surgeon, Postgraduate Student</p></bio><bio xml:lang="ru"><p>врач-хирург детский, аспирант</p></bio><email>shidaev.a.kh@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3957-1615</contrib-id><contrib-id contrib-id-type="spin">7936-8722</contrib-id><name-alternatives><name xml:lang="en"><surname>Kagantsov</surname><given-names>Ilya M.</given-names></name><name xml:lang="ru"><surname>Каганцов</surname><given-names>Илья Маркович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med.), Chief Researcher</p></bio><bio xml:lang="ru"><p>д-р мед. наук, главный научный сотрудник</p></bio><email>ilkagan@rambler.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5435-8487</contrib-id><contrib-id contrib-id-type="spin">4818-9170</contrib-id><name-alternatives><name xml:lang="en"><surname>Kondrateva</surname><given-names>Evgeniia A.</given-names></name><name xml:lang="ru"><surname>Кондратьева</surname><given-names>Евгения Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Pediatric Surgeon</p></bio><bio xml:lang="ru"><p>врач-хирург детский</p></bio><email>zhenya-muz@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Rostov State Medical University</institution></aff><aff><institution xml:lang="ru">Ростовский государственный медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Rostov Regional Children’s Clinical Hospital</institution></aff><aff><institution xml:lang="ru">Областная детская клиническая больница</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Perinatology and Pediatrics, V.A. Almazov National Medical Research Center</institution></aff><aff><institution xml:lang="ru">Институт перинатологии и педиатрии, Национальный медицинский исследовательский центр им. В.А. Алмазова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2022-05-18" publication-format="electronic"><day>18</day><month>05</month><year>2022</year></pub-date><pub-date date-type="pub" iso-8601-date="2022-07-24" publication-format="electronic"><day>24</day><month>07</month><year>2022</year></pub-date><volume>12</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>215</fpage><lpage>221</lpage><history><date date-type="received" iso-8601-date="2022-03-17"><day>17</day><month>03</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-05-16"><day>16</day><month>05</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Sizonov V.V., Shidaev A.K., Kagantsov I.M., Kondrateva E.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Сизонов В.В., Шидаев А.Х., Каганцов И.М., Кондратьева Е.А.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Sizonov V.V., Shidaev A.K., Kagantsov I.M., Kondrateva E.A.</copyright-holder><copyright-holder xml:lang="ru">Сизонов В.В., Шидаев А.Х., Каганцов И.М., Кондратьева Е.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://rps-journal.ru/jour/article/view/1245">https://rps-journal.ru/jour/article/view/1245</self-uri><abstract xml:lang="en"><p>Presentation of a rare clinical case of hydronephrosis of the lower half of the kidney due to vasoureteral conflict against the background of the complete doubling of the upper urinary tract. The rarity of this anomaly is demonstrated by only a single mention of a similar case in an adult patient in the literature.</p> <p>The patient, three years old, had dilatation of the upper urinary tract that was detected antenatally. According to the postnatal ultrasound results at three months, the anterior-posterior size of the pelvis of the lower half of the left kidney was 13 mm, and the parenchyma of the left kidney was 11 mm. The child was followed up on an outpatient basis. There were no laboratory or clinical manifestations of urinary tract infection. Ultrasound monitoring revealed progression of dilatation of the pelvis of the lower half max up to 40 mm and thinning of the kidney parenchyma in the projection of the lower pole up to 7 mm, in connection with which the child successfully underwent antevasal ureteropyeloanastomosis of the lower half of a completely doubled kidney. The anterior-posterior size of the pelvis of the lower half after removal of the pyelostomy was 16 mm. The child did not have any clinical and laboratory disease manifestations in the postoperative period.</p> <p>The described clinical case expands our understanding of the anatomy of obstruction of the pyeloureteral segment and hydronephrosis of the lower half of the duplex kidney. It enables us to plan surgical tactics, considering the possible intraoperative detection of the described anatomical configuration.</p></abstract><trans-abstract xml:lang="ru"><p>Представлено редкое клиническое наблюдение гидронефроза нижней половины почки вследствие вазоуретерального конфликта на фоне полного удвоения верхних мочевых путей. Редкость указанной аномалии демонстрируется наличием в литературе единственного упоминания об аналогичном случае у взрослого пациента.</p> <p>У пациента трех лет расширение верхних мочевыводящих путей было выявлено антенатально. По результатам постнатального ультразвукового исследования в 3 мес.: переднезадний размер лоханки нижней половины левой почки — 13 мм, паренхима левой почки — 11 мм. В дальнейшем ребенок наблюдался амбулаторно. Лабораторных и клинических проявлений инфекции мочевых путей не отмечалось. Ультразвуковой мониторинг выявил прогрессирование дилатации лоханки нижней половины максимально до 40 мм и истончение паренхимы почки в проекции нижнего полюса до 7 мм, в связи с чем ребенку успешно выполнен антевазальный уретеропиелоанастомоз нижней половины полностью удвоенной почки. Переднезадний размер лоханки нижней половины после удаления пиелостомы — 16 мм. У ребенка отсутствовали какие-либо клинико-лабораторные проявления заболевания в послеоперационном периоде.</p> <p>Описанный нами клинический случай расширяет представления об особенностях анатомии обструкции пиелоуретерального сегмента и гидронефроза нижней половины удвоенной почки и позволяет планировать хирургическую тактику с учетом возможного интраоперационного обнаружения описанной анатомической конфигурации.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hydronephrosis</kwd><kwd>obstruction of the lower half of the ureteropelvic segment</kwd><kwd>complete doubling</kwd><kwd>pyeloplasty</kwd><kwd>children</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гидронефроз</kwd><kwd>обструкция нижней половины лоханочно-мочеточникового сегмента</kwd><kwd>полное удвоение</kwd><kwd>пиелопластика</kwd><kwd>дети</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Schlussel RN, Retik AB. 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