Table 1.

CT characteristics of the right adrenal lesion.

Year of surveillance	Density	Enhancement pattern	Absolute washout	Size	Reported conclusion
0				8 mm	Most likely an adenoma.
0					Stable small right adrenal nodule, too small to characterise.
1				Unchanged	Right adrenal is unchanged with only slight bulkiness.
2	3 HU (non-contrast)			10 × 6 mm, unchanged	Right adrenal nodule is unchanged, likely an adenoma.
3	30 HU pre-contrast, 73 HU arterial phase, 102 HU portal venous phase and 42 HU delayed phase		72%	Unchanged	Stable small right adrenal lesion. The stability and absolute washout are in keeping with an adenoma.
4		Consistent with adenoma	Consistent with adenoma	Unchanged	Small right adrenal lesion, corresponding to an adenoma. Unchanged in size.
5		Consistent with adenoma	Consistent with adenoma	Unchanged	Stable right adrenal adenoma.
7	32 HU pre-contrast, 60 HU in arterial/portal venous/delayed phases		0%	66 × 49 mm	Significant increase in size of the right adrenal mass since previous scan.

CT, computed tomography; HU, Hounsfield units.