Chronic Pyelonephritis Presenting as Multiple Tumor-Like Renal Lesions

Tsuji, Takayuki; Ohtake, Takayasu; Yonemura, Katsuhiko; Sudoko, Hiroshi; Komiyama, Akira; Seki, Akihiko; Kato, Akihiko; Hishida, Akira

doi:10.2169/internalmedicine.46.1885

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…The differential diagnosis of diffuse renal enlargement can include pyelonephritis (22). In cases of pyelonephritis, multiple areas can be readily affected; in most cases, the lesions are well-defined, wedge-shaped areas with their bases at the periphery and their apexes towards the renal sinus (23), with the renal parenchyma sometimes exhibiting a striated appearance.…”

Section: Discussionmentioning

confidence: 99%

Imaging features of primary renal lymphoma

Zhu

et al. 2017

Acta Radiol

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Background Cases of primary renal lymphoma (PRL) are quite rare and are often mistaken for renal cell carcinoma. Purpose To determine the multislice computed tomography (MSCT) and magnetic resonance imaging (MRI) characteristics of PRL. Materials and Methods Twenty-three patients with PRL were identified by CT and MRI, and their tumor characteristics were assessed. Results Tumors exhibited single or multifocal nodules (n = 19) and diffuse renal enlargement (n = 4). Twenty-two tumors exhibited an infiltrative appearance. There was no evidence of calcification in any of the cases. Twenty-one tumors displaced or wrapped around abdominal vessels rather than encasing them. Enlarged retroperitoneal nodes were observed in three cases. Neither extension into the venous system nor distant metastasis was found. Tumor enhancement was of low attenuation compared with that of normal renal cortex and medulla ( P < 0.05). PRL was isointense on T1-weighted imaging, slightly hypointense on T2-weighted imaging and hyperintense on diffusion-weighted imaging. Twenty-two patients exhibited biopsy-confirmed PRN. There were four, 12, and seven cases of low-grade, intermediate-grade, and high-grade tumors, respectively. Patient were followed up over 16 to 166 months. Six patients died within three years and five patients died within five years. Conclusion Infiltrative appearance and tumor displacement or extension around abdominal vessels rather than vessel encasement are common findings on CT or MRI imaging and may suggest a diagnosis of PRL.

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Section: Discussionmentioning

confidence: 99%

Imaging features of primary renal lymphoma

Zhu

et al. 2017

Acta Radiol

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“…Pitfall : On ultrasound imaging , pseudotumors such as columns of Bertin and dromedary humps , as well as focal infarcts and focal bacterial pyelonephritis , can present as masslike abnormalities in the kidney (Tsuji et al 2007 ).…”

Section: Renal Pseudotumorsmentioning

confidence: 99%