A 78 year old man with a history of prostate adenocarcinoma has loin pain, anuria, and symptoms of acute kidney injury. What is the SINGLE most appropriate investigation?
A. MRI spine
B. Radionuclide bone scan
C. Transrectal Ultrasound
D. Ultrasound KUB
E. Abdominal X-ray
This man is suffering from obstruction of the ureters due to extension of cancer beyond the capsule causing loin pain and anuria. An ultrasound of the kidney and ureters would be appropriate.