A 74-year-old man complains of lower abdominal pain. He has become aware of a peri umbilical mass during that time. His past medical history is significant for hypertension and type 2 diabetes. He has a history of diverticulitis abdominal examination, there is a palpable mass extending from the pubic ramus to the umbilicus with a smooth contour. Laboratory results reveal a BUN of 14 mg/dL and a creatinine of 1.8mg/dL. Which of the following is the most appropriate next step in the management of this patient?
A. Digital rectal examination
B. Urethral catheterization
C. Abdominal sonogram
D. Abdominal and pelvic CT scan
E. Percutaneous nephrostomy
A. Digital rectal examination
B. Urethral catheterization
C. Abdominal sonogram
D. Abdominal and pelvic CT scan
E. Percutaneous nephrostomy