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      Adrenal suppression by oral high-dose medroxyprogesterone acetate in breast cancer patients.

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          Abstract

          The effects of oral MPA, 300 mg t.i.d., on adrenal function in postmenopausal patients with disseminated breast cancer were evaluated. The levels of serum cortisol, ACTH, androstenedione, DHEA-S, LH, FSH, GH, and prolactin in 22 patients receiving MPA were compared with those in another group of 28 postmenopausal patients in whom levels were measured before treatment. The median morning cortisol level was 70, 10-465 nmol/l (controls 395, range 155-785 nmol/l), median androstenedione 1.09, range 0.55-3.10 nmol/l (controls 3.75, range 1.23-9.81 nmol/l), and median DHEA-S 555, range 55-1,300 nmol/l (controls 2,440, range 1,015-6,340 nmol/l). No appreciable change in ACTH levels was found. Gonadotropins were also markedly suppressed. The median LH level was 4.3 (range 0.8-18) U/l, as against 83 (range 19-116) U/l in controls. The median FSH level was 7.2 (range 0.5-27) U/l, as against 71 (range 12-262) U/l in controls. Prolactin and GH levels remained largely unchanged. The suppression of androstenedione synthesis, the main precursor of postmenopausal estrogens, may represent the major therapeutic effect of high-dose MPA in postmenopausal patients with breast cancer.

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          Author and article information

          Journal
          Cancer Chemother. Pharmacol.
          Cancer chemotherapy and pharmacology
          0344-5704
          0344-5704
          1984
          : 12
          : 2
          6321047

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