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Lobar nephronia

Case contributed by Chris O'Donnell
Diagnosis almost certain

Presentation

Left loin pain and fever

Patient Data

Age: 20
Gender: Female
ultrasound

2 echogenic foci in the left kidney (upper pole lesion is mass-like and lower pole more wedge-shaped).  Note absence of blood flow on color Doppler

Case Discussion

Lobar nephronia is a focal area of infection in the kidney prior to abscess formation. The swelling associated with infection in lobar nephronia causes reduced blood due to extrinisic compression of blood vessels traversing the region.

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