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Cyclic Cushing's Syndrome: An Overview

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Abstract

Cyclic Cushing's syndrome (CS) involves rhythmic fluctuations in ACTH secretion resulting in a cyclic variation of adrenal steroid production. In the majority of cases, cyclic CS is caused by an ACTH-secreting pituitary adenoma, but it can also be due to ectopic ACTH production or an adrenal adenoma. This condition should be strongly suspected in patients with symptoms or signs of hypercortisolism but normal cortisol levels and paradoxical responses to the dexamethasone test, that may reflect an increasing or decreasing endogenous hormone activity. Dynamic tests are best interpreted if they are performed during a sustained period of hypercortisolism. Sometimes, it is necessary to confirm the diagnosis over lengthy periods of observation. Responses to treatment must be closely monitored, interpreted and evaluated with caution because of the potential variations in steroidogenesis. An original case report of a cyclic Cushing's syndrome is presented in this review.

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Authors and Affiliations

  1. Division of Endocrinology, Department of Medical and Surgical Sciences, University of Padua, Italy

    Franco Mantero, Carla M. Scaroni & Nora M. E. Albiger

  2. Division of Endocrinology, Department of Medical and Surgical Sciences, University of Padua, Via Ospedale 105, Padua, 35128, Italy

    Franco Mantero

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  1. Franco Mantero
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  2. Carla M. Scaroni
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Correspondence to Franco Mantero.

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Mantero, F., Scaroni, C.M. & Albiger, N.M.E. Cyclic Cushing's Syndrome: An Overview. Pituitary 7, 203–207 (2004). https://doi.org/10.1007/s11102-005-4025-5

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