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. 2011 Aug 24:5:411.
doi: 10.1186/1752-1947-5-411.

Inflammatory pseudotumor of the kidney: a case report

Abdelhak Khallouk  1 , Youness Ahallal, Mohammed Fadl Tazi, Hinde Elfatemi, Elmehdi Tazi, Jalaleddine Elammari, Mohammed Jamal Elfassi, Moulay Hassan Farih
Affiliations

Inflammatory pseudotumor of the kidney: a case report

Abdelhak Khallouk et al. J Med Case Rep. .

Abstract

Introduction: Inflammatory pseudotumors, also known as inflammatory myofibroblastic tumors, are uncommon benign tumors of unknown etiology which may develop at several anatomical sites. In the urogenital tract, inflammatory pseudotumor usually affects the urinary bladder or the prostate. Inflammatory pseudotumor of the kidney is very rare. It is considered as a reactive inflammatory lesion that features very good prognosis.

Case presentation: We present the case of a 57-year-old Moroccan man who presented with a two-month history of gross hematuria and left lumbar pain. Imaging investigations revealed a left kidney mass and pathological examination of the nephrectomy specimen showed an inflammatory pseudotumor.

Conclusion: As the preoperative definitive diagnosis of such a tumor is not possible, surgery is advised because only pathological examination of the nephrectomy specimen can establish the diagnosis with certainty. From one case report and literature review, the authors suggest a diagnostic and therapeutic strategy for the management of this rare tumor.

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Figures

Figure 1
Figure 1
CT scan showing a huge cystic tumor of the left kidney.
Figure 2
Figure 2
Photomicrograph showing dense collagen fibrous tissue and inflammation with cellular zone consisting of spindle cells (HES × 5).
Figure 3
Figure 3
Photomicrograph showing area of myofibroblastic proliferation with plasma cells and siderophages (HES × 20).
See this image and copyright information in PMC

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