Maternal X chromosome pericentric inversion resulting in the genetic analysis of offspring pedigrees with deletions at Xp22.33 and Xp22.33p11.3, and duplications at Xq27.3q28 Case report

Abstract

Rationale: This study investigates the genetic cause of primary infertility and short stature in a woman, focusing on maternal X chromosome pericentric inversion and its impact on offspring genetic outcomes, including deletions at Xp22.33 and Xp22.33p11.3, and duplications spanning Xq27.3 to the distal end of the X chromosome's long arm. Patient concerns: The proband presented with primary infertility, menstrual irregularities, and ultrasound findings indicating a small uterus. Diagnoses: Peripheral blood G-banded karyotype analysis and single nucleotide polymorphism array analysis revealed a 46, X, rec(X)dup(Xq)inv(X)(p11.3q27)dmat karyotype in the proband, inherited from her mother. Genetic testing identified pathogenic deletions at Xp22.33 and Xp22.33p11.3, and a pathogenic duplication at Xq27.3q28. Interventions: Genetic counseling and pedigree analysis were conducted to trace the maternal origin of the pericentric inversion and assess recurrence risks. Outcomes: The study confirmed the maternal X chromosome pericentric inversion caused the observed genetic abnormalities, with a 50% recurrence risk for X-linked inheritance. Lessons: Maternal X chromosome pericentric inversion significantly affects offspring genetic outcomes. Assisted reproductive technologies, including in vitro fertilization with preimplantation genetic testing, are recommended to reduce recurrence risks in future pregnancies. Prenatal genetic testing is advised for natural conception to ensure fetal genetic health.