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  • Title: [Diagnostic efficacy of plasma ACTH-measurement by a chemiluminometric assay in canine hyperadrenocorticism].
    Author: Zeugswetter F, Pagitz M, Hittmair K, Schwendenwein I.
    Journal: Schweiz Arch Tierheilkd; 2011 Mar; 153(3):111-6. PubMed ID: 21360448.
    Abstract:
    This retrospective study was performed to investigate the diagnostic efficacy of the chemiluminometric ACTH-measurement to differentiate between pituitary and adrenal dependent hyperadrenocorticism (HAC) in dogs. 49 dogs with pituitary HAC, 10 dogs with adrenal HAC and 1 dog with a combination of both pathologies were included. Dogs with HAC like symptoms, where HAC had been ruled out, served as controls (n = 18). All dogs with adrenal HAC, as well as 9 dogs with pituitary HAC had an ACTH concentration below the detection limit of 2.2 pmol/l (10 pg/dl) plasma. Using 2.2 pmol/l as a cut-off the sensitivity and specificity to diagnose pituitary HAC was 0.82 (95 % CI 0.686 - 0.914) and 1 (95 % CI 0.692 - 1), respectively. With the help of the chemiluminometric assay, a correct classification was possible in 85 % of patients with HAC. As an ACTH-concentration below the detection limit was found in dogs with adrenal as well as pituitary HAC, additional discriminatory tests are necessary in these cases.
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