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Fig. 7B. —50-year-old man with left aldosterone-producing adenoma diagnosed on adrenal venous sampling and histology after surgery but incorrectly diagnosed by radiologist as bilateral adrenal hyperplasia. Unenhanced CT image of left adrenal gland shows its limbs (straight arrow) appear hyperplastic. However, mean limb width of both glands is 4.3 mm and algorithm suggests adrenal venous sampling. In retrospect, slightly nodular appearance of medial limb (curved arrow) could represent missed adenoma.