DHEAS

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Também chamado: DHEA-SO4; DHEA Sulfate
Nome formal: Dehydroepiandrosterone Sulfate
Exames relacionados: Testosterone; ACTH; FSH; LH; Prolactin; Estrogen

De relance

Por que fazer este exame?

To determine if DHEAS concentration is normal and to help evaluate adrenal gland function

Quando fazer este exame?

A woman who has excess facial and body hair (hirsutism), acne, amenorrhea, or infertility; a male child who is undergoing very early (precocious) puberty or a female child who is showing signs of virilization

Amostra:

A blood sample drawn from a vein in your arm

É necessária alguma preparação?

None needed, although women should talk to their doctors about the timing of the test. The doctor may want to have the sample collected a week before or after your menstrual period.

A amostra

O que está sendo pesquisado?

Dehydroepiandrosterone sulfate (DHEAS) is an androgen, a male sex hormone that is present in the blood of both men and women. It has a role to play in developing male secondary sexual characteristics at puberty, and it can be metabolized by the body into more potent androgens, such as testosterone and androstenedione, or can be changed into the female hormone estrogen. DHEAS is produced by the adrenal cortex, the outer layer of the adrenal glands, with smaller amounts being produced by the woman's ovaries and man's testes. DHEAS secretion is controlled by the pituitary hormone adrenocorticotropic hormone (ACTH) and by other pituitary factors.

Since DHEAS is primarily produced by the adrenal glands, it is useful as a marker for adrenal function. Adrenal tumors, cancers, and hyperplasia can lead to the overproduction of DHEAS. While elevated levels may not be noticed in adult men, they can lead to amenorrhea and visible symptoms of virilization. These changes vary in severity and may include:

  • a deeper voice
  • hirsutism
  • male pattern baldness
  • muscularity
  • acne
  • enlargement of the Adam’s apple
  • Excess levels of DHEAS in children can cause precocious puberty in boys; and ambiguous external genitalia, excess body hair, and abnormal menstrual periods in girls.

    Como a amostra é obtida para o exame?

    A blood sample is obtained by inserting a needle into a vein in the arm. As an alternative, particularly in pediatric care, the blood sample is drawn from the fingertip. This is often called a "fingerstick."

    NOTA: Se exames médicos em você ou em alguém importante para você o deixam ansioso ou constrangido, ou se você tem dificuldade de lidar com eles, leia um ou mais dos seguintes artigos: Lidando com dor, desconforto ou ansiedade durante o exame, Conselhos sobre exames de sangue, Conselhos para ajudar crianças durante exames médicos, and Conselhos para ajudar idosos durante exames médicos.

    Outro artigo, Siga essa amostra, fornece uma visão da coleta e do processamento de uma amostra de sangue e de uma amostra de cultura da garganta.

    É necessário algum preparo para garantir a qualidade da amostra?

    No test preparation is needed. Women should talk to their doctors about the timing of the test. The doctor may want to have the sample collected a week before or after the woman’s menstrual period.

    O exame

    Perguntas frequentes

    Pergunte ao laboratório

    * indica um campo necessário



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    Fontes do artigo

    « Voltar para páginas relacionadas

    NOTA: Este artigo se baseia em pesquisas que incluíram as fontes citadas e a experiência coletiva de Lab Tests Online Conselho de Revisão Editorial. Este artigo é submetido a revisões periódicas do Conselho Editorial, e pode ser atualizado como resultado dessas revisões. Novas fontes citadas serão adicionadas à lista e distinguidas das fontes originais usadas.

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    S2
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