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Incidental adrenal nodule identified on previous CT scan performed for abdominal pain (arrows). A region of interest drawn over an adrenal nodule demonstrated a density of 13 HU on unenhanced CT (A), 80 HU on portal venous phase (B), and 36 HU on the 12-minute delayed phase (C), corresponding to a relative washout of 55% and an absolute washout of 66%. Findings are diagnostic of an adenoma.
