A 74-year-old man complains of lower abdominal pain. He has become aware of a periumbilical mass during that time. His past medical history is significant for hypertension and type 2 diabetes. He has a history of diverticulitis 1 year ago. On physical examination, he is a febrile and appears mildly uncomfortable. On abdominal examination, there is a palpable mass extending from the pubic ram us to the umbilicus with a smooth contour. Laboratory results reveal a BUN of 14mg/dL and a creatinine of 1.8mg/dL. Which of th following is the most appropriate next step in the management of this patient?
A. Digital rectalexamination
B. Urethral catheterization
C. Abdominal sonogram
D. Abdominal and pelvic CT scan
E. Percutaneous nephrostomy
A. Digital rectalexamination
B. Urethral catheterization
C. Abdominal sonogram
D. Abdominal and pelvic CT scan
E. Percutaneous nephrostomy