Failure of functional imaging with gallium-68-DOTA-D-Phe1-Tyr3-octreotide positron emission tomography to localize the site of ectopic adrenocorticotropic hormone secretion: a case report

Table 1 Reported sensitivity and specificity of commonly utilized dynamic biochemical diagnostic tests for determining the site of excess ACTH secretion

Diagnostic Test	Sensitivity	Specificity
Overnight high dose dexamethasone suppression test (8 mg) [3]	59-92%	67-100%
IV dexamethasone suppression test [5]	95-100%	40-90%
Ovine CRH stimulation test [5]	85-93%	85-90%
IPS sampling (central: peripheral gradient) [6]	81-85%	90-100%

ISSN: 1752-1947