Atli, Emine IkbalAtli, EnginInan, CihanVarol, Gulizar FusunMail, CisemErbilen, Esra AltanYalcintepe, Sinem2024-06-122024-06-1220221028-4559https://doi.org/10.1016/j.tjog.2022.03.018https://hdl.handle.net/20.500.14551/23316Objective: The 18q terminal deletion with inverted duplication is an extremely rare abnormality, with only three confirmed cases in Europe to date. Here, we report, for the first time, a case of de novo 18q invdup-del in a Turkish pregnant woman. Case report: A 30-year-old pregnant woman was referred for genetic analysis at her 25th gestational week due to foetal diaphragmatic hernia and rocker bottom feet. Cytogenetic analysis of the parents revealed a karyotype of 46,XX,inv(18) (p11.3q21.3) of the mother and a normal karyotype of the father. The foetal karyotype was defined as 46,XX,rec(18)del(18q)inv(18) (p11.3q21.3)mat. Conclusion: To our knowledge, this is the first report of a prenatal diagnosis. Genetic counselling issues for this family, particularly affected individuals, include an increased likelihood of reduced fertility and a risk of recurrence of parental inversion equal to 1/2 in surviving offspring. (c) 2022 Taiwan Association of Obstetrics & Gynecology. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).en10.1016/j.tjog.2022.03.018info:eu-repo/semantics/openAccessPrenatal DiagnosisPericentric InversionChromosome 18KaryotypingPure Trisomy 18pDeletionArticle613504509Q3WOS:0008066353000202-s2.0-8512776148235595446Q2