Abstract
Cyclic Cushing’s disease (CD) is characterized by fluctuations in clinical or biochemical indices of hypercortisolism, and is often marked by periods of disease activity alternating with relative quiescence. Retrospectively collected data suggest that cyclic CD accounts for approximately 15–19% of all CD cases. The pathogenesis of this condition remains obscure. Other than the presence of spontaneous fluctuations in its course, there are no distinguishing clinical or laboratory features of cyclic CD. However, the presence of varying degrees of hypercortisolism during its natural history frequently leads to major diagnostic difficulties, confounding the interpretation of diagnostic testing. Furthermore, assessment of the outcome of therapeutic interventions can be hampered by the intermittent nature of hypercortisolism inherent in cyclic CD. Prospective studies may be helpful in further elucidating the natural history of cyclic CD and molecular studies will be needed to understand the pathophysiology of this enigmatic and challenging condition.
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Tritos, N.A., Biller, B.M.K. (2011). Cyclic Cushing’s Disease. In: Swearingen, B., Biller, B. (eds) Cushing's Disease. Endocrine Updates, vol 31. Springer, Boston, MA. https://doi.org/10.1007/978-1-4614-0011-0_6
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DOI: https://doi.org/10.1007/978-1-4614-0011-0_6
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