For each of the features listed on the left select the most appropriate cause from the list on the right

The answer is B, C, A. The relationship between cortical scars and calyceal scars is important in differentiating the scarred kidneys of pyelonephritis from other causes of scarring, i.e., hypertension (E).

Infective endocarditis results in septic emboli which cause pyaemic abscesses in the kidneys.

Acute inflammation of the pelvis associated with streaks of pus extending along the medullary rays to the cortex is seen in acute pyelonephritis.

Renal artery stenosis (D) results in a uniform contraction of the kidney, usually unilateral.