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  • Title: A case of preclinical Cushing's syndrome associated with diurnal rhythms of ACTH and cortisol in blood: correlation with histological findings.
    Author: Ikarashi T, Kamoi K, Asakawa K, Tanaka M, Miyakoshi M, Komeyama T, Morishita H, Usuda H, Emura I, Sasano H.
    Journal: Endocr J; 2006 Oct; 53(5):609-13. PubMed ID: 16896266.
    Abstract:
    We describe a case of adrenocortical adenoma with preclinical Cushing's syndrome demonstrating diurnal rhythms of ACTH and cortisol in blood. A 50-year-old man was admitted to the hospital for the evaluation of incidental right adrenal mass with hyperglycemia and hypertension. On admission, there were no signs of clinical manifestation of hypercortisolism. The basal levels of cortisol (9.3 microg/dl) and ACTH (9.4 pg/ml) at 0800 h were not elevated and these diurnal rhythms were maintained. One or 8 mg of dexamethasone given orally overnight suppressed the plasma ACTH but not serum cortisol. Ultrasonogram, CT and scintiscan of (131)I adosterol all demonstrated an enlarged adrenal mass in the right adrenal gland. The right adrenal gland was subsequently resected by laparoscopic surgery. Histopathological findings of resected adrenal tumor were consistent with adrenocortical adenoma. Adjacent non-neoplastic adrenal tissue demonstrated adrenocortical atrophy but DHEA-sulfotransferase immunoreactivity in the zona reticularis was detected.
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