PMC8170294_01
Ultrasound of kidneys, ureters, and bladder. (A) (Baseline) A heterogeneous
structure noted in the left kidney extending from the mid to lower pole.
This lesion is consistent with a renal abscess and much of it appears
liquefied. (B) (Day 3 post drainage) Abscess decreased in size. (C) (Day 10
post drainage) Previously noted abscess smaller in size with catheter in
situ. (D) (Day 27 post-drainage) Cystic lesion no longer visualized.
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Imaging of both kidneys showed multiple cysts and a heterogeneous structure 4.2 cm x 4.0 cm x 3.1 cm (Figure 1A) extending from the left mid to the lower pole, consistent with a renal abscess, and much of it appeared liquefied. Her fever lysed by the second day post-drainage, and by day 3 post-drainage, the renal abscess decreased to 2.0 cm x 1.9 cm x 1.9 cm (Figure 1B). Her C-reactive protein normalized by day 10 post-drainage (4.1 mg/L), with a further decrease in renal abscess size to 2.1 cm x 1.4 cm x 1.6 cm (Figure 1C). By day 27 post-drainage, the abscess had resolved completely on the ultrasound scan (Figure 1D).