5 alfa - reductase type 2 deficency : importance of hormonal evaluation in the diagnosis, including anti-mullerian hormone levels / Deficiencia da 5 alfa - redutase tipo 2 : importancia da avaliação hormonal no diagnostico, incluindo dosagem do hormonio anti-mulleriano

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The clinical features of 5a-reductase 2 deficiency patients are hardly distinguishable from those of the other causes of pseudohennaphroditism, especially androgen insensitivity syndromes; the diagnosis becomes even more difficult when family history is unremarkable and there are no clues to a pattem of inheritance. The aim of this study was to eValuatethe hormonal profile, including anti-MüIlerian hormone (AMH), in patients with molecular diagnosis of 5a-reductase 2 deficiency. Data from 14 patients have been analyzed according to age and pubertal stage. Sex ambiguity was rated as Prader m in 11 cases; both gonads were palpable in alI but 2 patients, who had been previously submitted to gonadectomy. LH, FSH, testosterone (T), dihydrotestosterone (DHf) and AMH serum levels were measured in alI patients; T and DHf were also measured in 20 controls. The age range was 21 days to 29 years; 7 patients had reached puberty. In the patients who retained the gonads, LH and FSH levels were normal; TIDHf was elevated in alI cases when compared to controls; alI prepubertal patients had AMH levels <-1 SD for age, while pubertal patients had AMH levels compatible with pubertal stage. This study shows the usefulness of AMH to direct molecular analysis in 46,XY patients with genital ambiguity and normal or elevated T levels, particularly in isolated prepubertal cases; those with AMH values above the mean should be screened for mutations in the androgen receptor gene; if values are below the mean, SRD5A2 gene mutations should be investigated

ASSUNTO(S)

androgenos disturbios sexuais sindrome adrenogenital

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