Hippocampal Complex Volume and Memory Dysfunction in Cushing's Syndrome

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00004326
Recruitment Status : Completed
First Posted : October 19, 1999
Last Update Posted : June 24, 2005
University of Michigan
Information provided by:
National Center for Research Resources (NCRR)

Brief Summary:

OBJECTIVES: I. Evaluate whether chronic hypercortisolemia is specifically toxic to hippocampal cells and causes structural reduction of hippocampal volume in patients with Cushing's syndrome.

II. Determine whether reduced hippocampal volume is associated with specific memory dysfunction.

III. Examine the relationships of adrenal androgen to hippocampal volume and memory dysfunction.

IV. Examine the reversibility of hippocampal structural changes and cognitive dysfunction after cortisol levels are normalized.

Condition or disease
Cushing's Syndrome

Detailed Description:

PROTOCOL OUTLINE: Patients undergo a psychiatric evaluation for mood and cognition during confirmation of diagnosis. Neuropsychologic exams include pencil and paper test and a cognitive assessment.

Endocrine studies include dexamethasone and corticotropin-releasing hormone stimulation tests. The hippocampal complex volume is assessed with coronal magnetic resonance imaging.

There is a follow-up 1 year after the initiation of treatment.

Study Type : Observational
Estimated Enrollment : 12 participants
Primary Purpose: Screening
Study Start Date : August 1994

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U.S. FDA Resources

Information from the National Library of Medicine

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Ages Eligible for Study:   15 Years to 80 Years   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Adults and teenagers with untreated, spontaneous active Cushing's syndrome
  • Diagnosis verified at the University of Michigan Medical Center, including the following: Excessive cortisol secretion measured by urinary-free cortisol, cortisol secretion rate, and plasma cortisol level
  • Lack of normal circadian cortisol secretion and failure to suppress following 2 mg of dexamethasone

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00004326

United States, Michigan
University of Michigan Health Systems
Ann Arbor, Michigan, United States, 48109
Sponsors and Collaborators
National Center for Research Resources (NCRR)
University of Michigan
Study Chair: Monica N. Starkman University of Michigan Identifier: NCT00004326     History of Changes
Other Study ID Numbers: 199/11872
First Posted: October 19, 1999    Key Record Dates
Last Update Posted: June 24, 2005
Last Verified: April 2002

Keywords provided by National Center for Research Resources (NCRR):
Cushing's syndrome
endocrine disorders
rare disease

Additional relevant MeSH terms:
Cushing Syndrome
Pathologic Processes
Adrenocortical Hyperfunction
Adrenal Gland Diseases
Endocrine System Diseases