Smith‐Lemli‐Opitz syndrome in two 46,XY infants with female external genitalia

Carol Greene, William Pitts, Ron Rosenfeld, Luigi Luzzatt

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22 Scopus citations


Two infants with features of the Smith‐Lemli‐Opitz (SLO) syndrome were found to have a 46,XY karyotype and female external genitalia. Autopsies showed normal testes for age with normal Wolffian duct structures and without Müllerian duct derivatives. This failure of masculinization of the external genitalia is an unusual finding and may represent the extreme of a spectrum of the genital anomalies commonly seen in males with this autosomal recessive syndrome. An endocrine evaluation on one of these infants at 3 months suggested unusually low testosterone production and meagre response to stimulation with human chorionic gonadotro‐pin (hCG). The failure of complete masculinization of external genitalia in some cases of SLO syndrome may be due to inadequate testosterone production in utero.

Original languageEnglish (US)
Pages (from-to)366-372
Number of pages7
JournalClinical Genetics
Issue number4
StatePublished - Apr 1984
Externally publishedYes


  • Male pseudohermaphroditism
  • Smith‐Lemli‐Opitz syndrome

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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