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- ArticleCattolica EV, Solomon IL.J Urol. 1978 Jul;120(1):103-5.The mosaic karyotype XO/XY is expressed by a spectrum of genital phenotypes, ranging from normal male through ambiguous genitalia to normal female. The urologist may see some of these patients because of the following clinical presentations: 1) ambiguous genitalia with a chromatin-negative buccal smear, 2) hypospadias with cryptorchidism or 3) cryptorchidism with müllerian remnants, discovered unexpectedly during inguinal operations. Reliable karyotyping is mandatory for diagnosis of XO/XY patients. Management should include laparotomy with excision of any intra-abdominal gonads (testis and/or streak gonad) because these are prone to develop malignancies that may occur before puberty. Female sex assignment and a reconstructive operation are advised in cases with severely deficient virilization of the genitalia.