Comparative Analysis of Clinical, Hormonal and Morphological Studies in Patients with Neuroendocrine ACTH-Producing Tumours

Table 2

Plasma ACTH gradient revealed by selective blood sampling from petrosal sinuses in the desmopressin stimulation test in patients with Cushing's disease and ectopic ACTH secretion.

ACTH gradient; Center/periphery	Cushing's disease; (𝑛=31)	Ectopic ACTH secretion; (𝑛=15)
Baseline level	Above 2	Below 2
After stimulation	Above 3	Below 2
Intersinus gradient	Above 2.4	Below 1.4