Clinical Characteristics of Endogenous Cushing’s Syndrome at a Medical Center in Southern Taiwan

Table 3

Comparison of baseline plasma ACTH levels between patients with ACTH-independent Cushing’s syndrome and ACTH-dependent Cushing's syndrome (CS).

Baseline plasma ACTH levels (pg/mL) at 0800 h	ACTH-independent CS% (number of patients)	Cushing's disease% (number of patients)	Ectopic CS% (number of patients)
0 < ACTH ≦ 10	62.8% (27/43)
10 < ACTH ≦ 20	25.6% (11/43)
20 < ACTH ≦ 28.7	11.6% (5/43)
37.4 ≦ ACTH ≦ 52		18.8% (3/16)
52 < ACTH ≦ 328		81.3% (13/16)	33.3% (1/3)
427 ≦ ACTH ≦ 725			66.7% (2/3)

Normal range of baseline plasma ACTH levels: 9–52 pg/mL.