What diagnostic test is MOST appropriate to evaluate for perinephric abscess?A. Abdominal ultrasound
Correct Answer: D
The diagnosis of perinephric or renal abscess should be confirmed by imaging. The most commonly used imaging modality is CT scan (Answer B), which has the added advantage of diagnosing extension of infection to adjacent structures, which is more difficult to see on ultrasound imaging (Answer A). MRI (Answer C) is highly sensitive for detecting changes in the urinary tract, but is generally less accessible than CT or ultrasound imaging, and is the least often used. Choice of imaging modality to confirm the diagnosis of renal or perinephric abscess should be tailored to the individual patient and their clinical situation.