Ovotesticular disorder of sex development with unusual karyotype: patient report

Background: Ovotesticular disorder of sex development (OT-DSD) (true hermaphroditism) is an anatomopathological diagnosis based on the findings of testicular and ovarian tissues in the same subject, in the same gonad (ovotestis), or in separate gonads. OT-DSD is a rare cause of sex ambiguity, and the most common karyotype is 46,XX; mosaics and chimeras are found only in 10%–20%. Aim: To report a case of an OT-DSD patient with a rare karyotype constitution. Case report: A 2-month-old child with male sex assignment was referred to our clinic for investigation of sex ambiguity. He was the second child of healthy unrelated parents; pregnancy and labor were uneventful. On physical examination, he had a 2.3-cm phallus and perineal hypospadias (Prader grade III); the right gonad was in the labioscrotal fold and the left was found in the inguinal channel. Karyotype was 46,XX/47,XXY/48,XXYY. Anatomopathological examination of gonads revealed right testis and left ovotestis. The male sex assignment was maintained; the child underwent left gonadectomy, removal of Mullerian structures and urethroplasty. Conclusion: A thorough revision of literature revealed a single case of OT-DSD with the same chromosome constitution. Gonadal biopsy is necessary to establish diagnosis in cases of sex chromosome mosaicism.