Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 55 10 2017 12 02 655 657 EN Arya Sotoudeh Growth and Development Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Pediatric Endocrinology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. Parastoo Rostami Growth and Development Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Pediatric Endocrinology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. Maryam Nakhaeimoghadam Growth and Development Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Pediatric Endocrinology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. Reihaneh Mohsenipour Growth and Development Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Pediatric Endocrinology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. Nima Rezaei Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. AND Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran. 2016 06 11 2017 04 10 Pericentric inversion of Chromosome 9 is one of the most common chromosomal abnormalities, which could be associated with various manifestations in some cases. Herein, a patient is presented with ambiguous genitalia that karyotyping revealed pericentric inversion of Chromosome 9 (p12,q13). Pericentric inversion of Chromosome 9 could be considered in the list of differential diagnosis of those with ambiguous genitalia, while chromosomal karyotype and culture could be recommended in children with ambiguous genitalia. https://acta.tums.ac.ir/index.php/acta/article/view/5693 https://acta.tums.ac.ir/index.php/acta/article/download/5693/5004