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Click 58 year old female with a history of breast cancer and incidental focal uptake in kidney on bone scan, undergoing ultrasound scan for further characterisation. Longitudinal and transaxial images from ultrasound scan of the left kidney demonstrate a cystic lesion in the upper pole of the left kidney, measuring 2.3 x 1.7cm. The mass is predominantly hypoechoic but contains small focal areas of hyperechogenicity with posterior acoustic shadowing suggestive of calcification. There was no increased Doppler flow in the lesion. This proved to be a calyceal diverticulum. The remainder of the left kidney appears normal. (Technique: Ultrasound renal tract performed with 5-2MHz curvilinear probe).

Click 58 year old female with known breast cancer undergoing investigation of cystic mass in the upper pole of the left kidney, which proved to be a calyceal diverticulum. Precontrast axial image demonstrates a well defined area of low attenuation in the upper pole of the left kidney, which contains a focal area of internal calcification. No thickened wall is identified. Post contrast the mass demonstrates no enhancement. The reminder of the left kidney appears normal, as does the right kidney. (Technique: CT scan of the upper abdomen. Performed on GE single slice CT scanner, 300mAs, 120kVp, 5mm slice thickness. Unenhanced scan followed by post contrast images taken in portal venous phase following administration of 97mls of Optiray300).