Cases reported "Nephritis"

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1/3. Acute focal bacterial nephritis: report of four cases.

    Focal acute bacterial nephritis is a localized bacterial infection of the kidney presenting as an inflammatory mass not containing drainable pus. The further distinction between acute focal bacterial nephritis and other renal masses is aided by the appropriate use of renal sonography and computed tomography. We report 4 cases with this entity.
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keywords = bacterial infection
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2/3. Evolution of acute focal bacterial nephritis into a renal abscess.

    Acute focal bacterial nephritis (AFBN) is a localized bacterial infection of the kidney presenting as an inflammatory mass without frank abscess formation, which may represent a relatively early stage of renal abscess. The pathogenesis of AFBN is thought to be hematogenous infection or ascending infection from the lower urinary tract. For the majority of children, the pathogenesis may be related to ascending infection, because pre-existing malformative uropathy, especially vesicoureteral reflux (VUR), is common in pediatric patients. Few clinical reports have demonstrated the evolution of this condition into renal abscess in children. We report a girl with AFBN associated with VUR that evolved into a renal abscess despite appropriate intravenous antibiotic therapy. We undertook serial radiological observation of its evolution. It is important to differentiate AFBN from renal abscess because the management of the two entities may be different, and follow-up studies are indispensable to determine appropriate therapy.
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keywords = bacterial infection
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3/3. Late sequelae of adult-onset acute bacterial nephritis.

    The late manifestations of adult-onset acute bacterial nephritis were studied in four patients from 4 months to 5.6 years following initial infection. An unusual combination of generalized (global) wasting of the kidney and focal calyceal clubbing developed within a few weeks of the acute infection. The pattern of calyceal deformity strongly suggests papillary necrosis; it may develop during the acute phase, but go unrecognized during excretory urography at that time because of impaired contrast material excretion. The combination of a small, smooth kidney and papillary necrosis previously has been associated only with the more severe forms of analgesic nephropathy. Observations in these patients indicate that the same urographic findings may also occur as a result of a single earlier episode of acute bacterial infection of the kidney.
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keywords = bacterial infection
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