Figure 15c. Cyst with apparent wall thickening due to normal parenchyma in an asymptomatic 68-year-old woman. (a) Contrast-enhanced CT scan shows a cystic mass with apparent wall thickening. (b) CT scan obtained immediately superior to a shows a fluid-filled mass without a perceptible wall. (c) Coronal MR image shows that the apparent wall thickening is due to the normal parenchymal beak. Lines A and B indicate the respective levels where a and b were obtained.