Exp Clin Endocrinol Diabetes 2006; 114(9): 490-497
DOI: 10.1055/s-2006-924332
Article

© J. A. Barth Verlag in Georg Thieme Verlag KG · Stuttgart · New York

A Cross-Sectional Study to Investigate Long-Term Cognitive Function in People with Treated Pituitary Cushing's Disease

A. Heald 1 , C. Parr 2 , C. Gibson 3 , K. O'Driscoll 4 , H. Fowler 2
  • 1Department of Endocrinology and Diabetes, Hope Hospital, Salford, United Kingdom
  • 2Department of Behavioural Medicine, Hope Hospital, Salford, United Kingdom
  • 3Department of Endocrinology, Manchester Royal Infirmary, Greater Manchester, United Kingdom
  • 4Department of Neuropsychiatry, Hope Hospital, Salford, United Kingdom
Further Information

Publication History

Received: December 30, 2005 First decision: April 4, 2006

Accepted: May 17, 2006

Publication Date:
17 November 2006 (online)

Abstract

Introduction: It has been proposed that exposure to high levels of endogenous steroids in untreated pituitary Cushing's disease damages hippocampal structures leading to impairment in learning and memory processes. We hypothesised that patients with treated pituitary Cushing's disease would perform significantly worse on tests of cognitive ability than those with nonfunctioning pituitary adenomas. Design: Sixteen adults with pituitary Cushing's disease (PCD) and 16 adults with non-functioning pituitary adenomas (NFA) undertook the following comprehensive neuropsychological assessments: National Adult Reading Test (NART: premorbid abilities), California Verbal Learning Test (CVLT 2 UK: learning and recall), Stroop (executive functioning), Trail-Making Test (TMT: executive functioning and attention), Adult Memory and Information Processing Battery (AMIPB: Information Processing Speed and Story Recall subtests). Results: There was no significant difference in premorbid IQ scores (NFA mean=101 SD=13; PCD mean=102, SD=13), in verbal learning nor any significant difference in the percentage of verbal material retained in story recall (AMIPB). Performance on higher executive tasks Stroop and TMT and on measures of information processing was similar. However, there were significant decrements between some mean scores for both groups and published normative data with a clear association between higher HADS depression scores and impaired objective memory and attention which was not specific to PCD. Conclusions: We found no difference in cognitive function between patients with PCD and NFA. The results suggest a discrepancy between patients’ subjective perception of functional cognitive impairments and objective findings on psychometric testing and point to the influence of affective symptoms on cognitive performance, particularly in Cushing's disease.

References

Correspondence

DM AdrianHeald 

Hope Hospital·Department of Endocrinology and Diabetes

Stott Lane

M6 8HD Salford

United Kingdom

Phone: 00/44/16 12 06 51 46

Fax: 00/44/16 12 06 59 89

Email: aheald@fs1.ho.man.ac.uk