Bilateral xanthogranulomatous perinephritis without renal parenchymal involvement

Verswijvel, G; Stagier, J.; Verhelle, J.; Roskams, Tania; Oyeit, R. H.

doi:10.1007/s003300051032

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…In unserem Kollektiv zeigten sich bei allen Patienten in der MRT in allen Fällen eine vergrößerte betroffene Niere. Die im Nierenparenchym um das Nierenbecken liegende Xanthomherde stellten sich, wie in der Literatur in Fallberichten beschrieben [1,7,12,15,16,19], in der T1-Wichtung mit nativ peripher und zentral hypointensem und inhomogenem Signal als Hinweis für die Nekrose dar (s.Abb. 1a).…”

Section: Computertomographieunclassified

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Magnetresonanztomographie der xanthogranulomatösen Pyelonephritis

et al. 2002

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Xanthogranulomatous pyelonephritis (XGP) is a rare chronic infection of the kidney. In this overview article we reevaluated the magnetic resonance imaging (MRI) findings of our four patients with histologically proven XGP and correlated them with the CT and ultrasound findings described in the literature. Additionally, we give an overview of the pathogenesis and epidemiology. The following criteria were found in MRI: hydronephrosis and/or urethral stricture, vesicoureteral reflux or neurogenic bladder depletion disorders, and calculus as the origin of urinary obstruction. Moreover, in contrast to normal pyelonephritis, XGP is accompanied by fatty deposits in the peripelvic parenchyma, which demonstrate contrast enhancement and form the typical so-called bear paw sign. As XGP is often accompanied by severe kidney failure, contrast-enhanced CT with nephrotoxic contrast agents should be avoided and MRI should be performed instead. Because of proven reduced nephrotoxicity of gadolinium chelates, MRI seems to be superior to CT in patients with suspected XGP. Essential for the correct diagnosis is consideration of the complete medical history including recurrent pyelonephritis to avoid malpractice.

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Section: Computertomographieunclassified

“…In der T2-Wichtung zeigte sich entsprechend zentral ein inhomogen angehobenes Signal mit peripher eher hypointensem Signal (s. Abb. 2), [1,19]. Die Kelchgruppen waren dilatiert.…”

Section: Computertomographieunclassified

Magnetresonanztomographie der xanthogranulomatösen Pyelonephritis

et al. 2002

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Hyper-IgG4 disease: report and characterisation of a new disease

Neild

Rodriguez‐Justo

Wall

et al. 2006

BMC Med

224

188

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Background: We highlight a chronic inflammatory disease we call 'hyper-IgG4 disease', which has many synonyms depending on the organ involved, the country of origin and the year of the report. It is characterized histologically by a lymphoplasmacytic inflammation with IgG4-positive cells and exuberant fibrosis, which leaves dense fibrosis on resolution. A typical example is idiopathic retroperitoneal fibrosis, but the initial report in 2001 was of sclerosing pancreatitis.

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Bilateral xanthogranulomatous perinephritis without renal parenchymal involvement

Abstract: A case of isolated bilateral xanthogranulomatous perinephritis, which presented as a symmetrical irregular perirenal rim of soft tissue, is reported. Differential diagnosis and image features on ultrasound, computed tomography, and magnetic resonance are discussed.

Cited by 2 publications

References 10 publications

Magnetresonanztomographie der xanthogranulomatösen Pyelonephritis

Magnetresonanztomographie der xanthogranulomatösen Pyelonephritis

Hyper-IgG4 disease: report and characterisation of a new disease

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