Table 2 Comparison of CT image features of lipid-poor adrenal adenoma and subclinical pheochromocytoma

Short diameter (mm)

21.26 ± 6.97

40.16 ± 14.27

t = 7.417 p < 0.001

30.78

0.743

0.897

0.891

Long diameter (mm)

27.72 ± 9.77

48.73 ± 16.84

t = 6.750 p < 0.001

39.15

0.714

0.923

0.882

NCCT (HU)

28.02 ± 7.91

36.87 ± 6.66

t = 5.461 p < 0.001

32.50

0.743

0.744

0.828

APCT (HU)

59.77 ± 19.60

79.40 ± 22.78

t = 3.951 p < 0.001

57.50

0.829

0.590

0.721

VPCT (HU)

81.64 ± 23.85

92.14 ± 18.82

t = 2.086 p = 0.041

73.00

0.857

0.385

0.614

DPCT (HU)

57.00 ± 18.90

75.06 ± 14.45

t = 4.557 p < 0.001

59.50

0.971

0.641

0.814