Renal abscess. Introduction. Abscess in the renal parenchyma Also known as the carbuncle of the kidney Etiology: Staphylococcus aureus: released from distance sources Injury to the kidney E. coli. Clinical features. Symptoms: fever, chills, loin pain Signs:
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36-year-old man with left renal abscess. Longitudinal gray-scale sonogram of left kidney shows well-defined hypoechoic mass (arrow) near mid region of kidney.
Nonenhanced CT scan through the mid pole of the right kidney demonstrates right renal enlargement and an area of decreased attenuation
A, Enhanced CT scan shows an irregular septated low-density mass (M) extensively involving the left kidney.
Note thickening of perinephric fascia) and extensive compression of the renal collecting system. Findings are typical of renal abscess.
B, Ultrasound longitudinal scan demonstrates a septated hypoechoic mass (M) occupying much of the renal parenchymal volume