Evaluation of the Combined Dexamethasone Suppression/Thyrotropin-Releasing Hormone Stimulation Test for Detection of Pars Intermedia Pituitary Adenomas in Horses

Abstract

The combined DEX/TRH test was more sensitive than either of its component tests and had a high NPV, but was not as specific as the TRH component alone (92%). The DEX/TRH test should be used to screen older horses for PIPA.