Figure 4. Case 8: 41-year-old female with hypertension. (a) Transverse ultrasound image of the right kidney. A bilobed cyst-like lesion with hyperechogenic mobile material in the lateral part and posterior acoustic shadow. (b) Pre-contrast supine CT shows a bilobed hypodense mass with mobile gravity-dependent calcified material in the lateral portion. (c) Pre-contrast prone CT: change in position of the calcified material in the lateral part of the bilobate cyst.

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