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... June 2018, a 55-year-old Egyptian male was referred with sub-acute onset bilateral flank pain and oliguria of 1 week duration, Initial renal ultrasonography demonstrated bilateral hydronephrosis which was confirmed by CT scan without contrast ( Figure 1A obstructing stones, evidence of hyperdense soft tissue lesions at the right renal pelvis, display (+33 HU) as well as the left renal pelvis extending into the left upper part of the ureter (white arrows), also, showed bilateral renal hilar lymph node enlargement (yellow arrows). ...