Adrenal adenoma

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Incidental finding on abdominal ultrasound (not shown), done for abdominal discomfort.

Patient Data

Age: 50 years
Gender: Female
ct

Well-defined ovoid hypodense right adrenal mass with no calcification, necrosis or hemorrhage. The attenuation value on non-contrast images was 17 HU. On post-contrast images, the density value was at 51 HU on the portal phase and 21 HU on the delayed phase (15 min). The absolute washout was ~88% and the relative washout was ~58%.

Case Discussion

An absolute washout of >60% or a relative washout of >40% highly suggests an adrenal adenoma.

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