EXPORT CITATION

Chapter-048 Pituitary Function Tests

BOOK TITLE: ESI Manual of Clinical Endocrinology

Author
1. Sachan Alok
2. Rajitha D
ISBN
9789351526476
DOI
10.5005/jp/books/12535_63
Edition
2/e
Publishing Year
2015
Pages
8
Author Affiliations
1. Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India, Sri Venkateswara, Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
2. Sri Venkateswara, Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
Chapter keywords
Anterior Pituitary, corticotropin, Cushing’s syndrome, Serum IGF-1, Insulin-induced Hypoglycemia, gonadotropins, posterior pituitary

Abstract

Pituitary function tests require detailed instructions and careful interpretation. Many endocrine secretory functions are affected by the deficiency of thyroid hormones. Various tests such as Thyrotropin test, corticotrophin test, insulin tolerance test, Cushing’s syndrome, serum IGF-1, L-dopa-propranolol test and gonadotropins etc are performed to estimate pituitary functions. Direct measurement of thyrotropin, total and free tetraiodothyronine and total and free triiodothyronine provides reasonable estimates of thyrotroph function and the evaluation of corticotroph cells helps to rule out hypofunction. Confirmation of diagnosis of Cushing\'s syndrome should be attained by low-dose dexamethasone suppression test. Measurement of serum IGF-1 provides a simple way to assess growth hormone secretion and the concentration IGF-1 in serum depends on age of the patients. Gonadotropin levels are low in children but gonadotropin test in adult men and women having hypogonadism, sex steroids and gonadotropins provide useful information. Other tests related to pituitary function are also described here.

Related Books

© 2019 Jaypee Brothers Medical Publishers (P) LTD.   |   All Rights Reserved

Powered by MPS ScholarStor