A 31-year-old Caucasian male was referred for panhypopituitarism resulting from a surgically removed craniopharyngioma. The patient had been previously submitted to kidney transplantation for end-stage renal disease from X-linked Alport syndrome (ATS). Subsequent quantitative fluorescent polymerase chain reaction analysis indicated a 47,XXY karyotype consistent with Klinefelter syndrome (KS). The relevance of this unique case stems from several issues: 1) KS was an unexpected finding because of a previous diagnosis of hypogonadotropic hypogonadism resulting from craniopharyngioma; 2) the discovery of a de novo p.G406S substitution causing ATS; and 3) the multifactor origin of severe sexual dysfunction. This is the first description of the co-occurrence of KS, ATS, and craniopharyngioma.
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