Pituitary

, Volume 11, Issue 2, pp 187–207

Systemic illness

Authors

  • Marta Bondanelli
    • Section of Endocrinology, Department of Biomedical Sciences and Advanced TherapiesUniversity of Ferrara
  • Maria Chiara Zatelli
    • Section of Endocrinology, Department of Biomedical Sciences and Advanced TherapiesUniversity of Ferrara
  • Maria Rosaria Ambrosio
    • Section of Endocrinology, Department of Biomedical Sciences and Advanced TherapiesUniversity of Ferrara
    • Section of Endocrinology, Department of Biomedical Sciences and Advanced TherapiesUniversity of Ferrara
Article

DOI: 10.1007/s11102-008-0112-8

Cite this article as:
Bondanelli, M., Zatelli, M.C., Ambrosio, M.R. et al. Pituitary (2008) 11: 187. doi:10.1007/s11102-008-0112-8

Abstract

Systemic illnesses are associated with alterations in the hypothalamic–pituitary–peripheral hormone axes, which represent part of the adaptive response to stressful events and may be influenced by type and severity of illness and/or pharmacological therapy. The pituitary gland responds to an acute stressful event with two secretory patterns: adrenocorticotropin (ACTH), prolactin (PRL) and growth hormone (GH) levels increase, while luteinizing hormone (LH), follicle-stimulating hormone (FSH) and thyrotropin (TSH) levels may either decrease or remain unchanged, associated with a decreased activity of their target organ. In protracted critical illness, there is a uniformly reduced pulsatile secretion of ACTH, TSH, LH, PRL and GH, causing a reduction in serum levels of the respective target-hormones. These adaptations are initially protective; however, if inadequate or excessive they may be dangerous and may contribute to the high morbidity and mortality risk of these patients. There is no consensus regarding the type of approach, as well as the criteria to use to define pituitary axis function in critically ill patients. We here provide a critical approach to pituitary axis evaluation during systemic illness.

Keywords

Pituitary functionDynamic testsCritical illnessSystem disease

Copyright information

© Springer Science+Business Media, LLC 2008