[go: up one dir, main page]

Hyperprolactinemia

Review
In: Endotext [Internet]. South Dartmouth (MA): MDText.com, Inc.; 2000.
.

Excerpt

Hyperprolactinemia is the most common hypothalamic-pituitary dysfunction, being an important cause of irregular menses and infertility amongst young women. Clinical and laboratory investigation is crucial to determine hyperprolactinemia etiology and to indicate the proper treatment. Prolactinoma is the most common cause of pathological hyperprolactinemia. Physiological and pharmacological causes must be ruled out. Macroprolactinemia is a laboratorial pitfall and must be ruled out in asymptomatic hyperprolactinemic individuals. Usually, treatment is not necessary. Hook effect is another laboratory pitfall that may underestimate prolactin levels confounding the differential diagnosis between macroprolactinomas and pseudoprolactinomas. Clinical treatment with dopamine agonists is effective in 80 to 90% of hyperprolactinemic patients leading to normal serum prolactin levels and tumor reduction. Normoprolactinemia after dopamine agonist (DA) withdrawal is possible in around 30% of cases. Hypogonadism and infertility are usually reversed upon prolactin level normalization due to DA treatment, allowing pregnancy in most patients. In micro and intrasellar macroprolactinomas, DA can be withdrawal after pregnancy confirmation. Dopamine agonists are usually well tolerated. Nevertheless, valvopathy and psychiatric side effects should be actively evaluated. Surgical treatment may be indicated in resistant/intolerant patients and symptomatic apoplectic tumors. Radiotherapy is rarely performed and must be reserved to control tumors growing in an aggressive fashion. Temozolomide is an alternative treatment for resistant/aggressive prolactinomas not responding to high doses of dopamine agonists, multiple surgeries, and radiotherapy. For complete coverage of all related areas of Endocrinology, please visit our on-line FREE web-text, WWW.ENDOTEXT.ORG.

Publication types

  • Review