A 66-year-old male with stage IV non-small cell lung carcinoma (adenocarcinoma) on first-line chemotherapy presents with fatigue, weight loss, hypotension (92/58 mmHg), and generalized hyperpigmentation. Laboratory findings reveal hyponatremia (128 mmol/L), elevated ACTH (480 pg/mL), low morning cortisol (3.2 mcg/dL), and failure of cortisol to rise above 18 mcg/dL on cosyntropin stimulation. Restaging CT abdomen and pelvis demonstrates the finding marked **A** in the diagram. Which of the following imaging features most strongly suggests metastatic rather than adenomatous adrenal disease?
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