WHO histological classification of benign renal neoplasms

Angiomyolipom

der Niere in der Sonographie. Der Tumor ist echoreich.

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Angiomyolipome

an beiden Nieren (Pfeile) in der Computertomographie. Die Tumore sind wegen ihres Fettgehaltes hypodens.

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Renal

angiomyolipoma • Renal angiomyolipoma - Ganzer Fall bei Radiopaedia

Salam, H. Renal angiomyolipoma. Case study, Radiopaedia.org. (accessed on 08 Nov 2022) https://doi.org/10.53347/rID-8200 • CC by-nc-sa 3.0 (modified)

Preschooler

with an abdominal mass. Sagittal US of the left kidney (above) shows a multicystic renal mass involving most of the left kidney. Coronal (lower left) and axial (lower right) T1 MRI with contrast of the abdomen shows the left renal mass to contain multiple thin septations and to have no solid component.The diagnosis was multilocular cystic nephroma.

pediatricimaging.org • CC-by-nc-sa 4.0

A rare case

of renal oncocytoma associated with erythrocytosis: case report. Preoperative MRI. MRI showing a solid right lower pole mass, well circumscribed with inhomogeneous internal structure.

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Onkozytom der

rechten Niere (im Bild links) in der Computertomographie. Typisches Radspeichenphänomen. die meisten Onkozytome sind jedoch ct-morphologisch nicht von anderen Nierentumoren, insbesondere vom klarzelligen Nierenzellkarzinom zu unterscheiden.

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Renal

leiomyoma: a case report and literature review. Abdominal CT demonstrating renal mass

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Renal

leiomyoma: a case report and literature review. Abdominal CT demonstrating renal mass

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Bilateral

renal lymphangiectasia. Coronal reformatted CT image showing bilateral perinephric and peripelvic fluid collections.

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A case of

atypical reninoma with mild hypertension and normal plasma renin activity but elevated plasma renin concentration. Abdominal contrast-enhanced CT and 18F-FDG PET-CT. A solid, circumscribed, low-density, cortical lesion (15 mm x13 mm) in the posterior lip of the left kidney, which appears to be moderately enhanced. There was no obvious enhancement in the arterial phase, but it was progressive in the venous phase and delayed phase. B mild FDG uptake in the mass

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Retroperitoneal

laparoscopic partial nephrectomy for treatment of metanephric adenoma (Report of 6 cases). Preoperative CT scan. a Non-contrast CT scan results indicated that there was soft tissue density shadows in the lower-middle portion of the right kidney, with a clear boundary, a size of 4.2 × 3.8 cm and a CT value of 30–36 HU. b, c The density is uniform, and the enhancement degree of the tumor was significantly lower than that of the surrounding normal renal parenchyma

springerplus.springeropen.com • CC-by-4.0

Pediatric

metanephric adenoma with Fanconi–Bickel syndrome: a case report and review of literature. Radiological evaluation. A Renal ultrasound documented a sharply marginated peripheral hypoechoic hypovascular mass at the upper pole of the left kidney measuring 2 × 2 cm. B, C Computerized tomography scan of the abdomen showing a partially exophytic homogenously enhancing mass at the upper pole of the left kidney measuring 1.8 × 1.9 × 2 cm

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Ten-year

follow-up of renal adenomatosis with magnetic resonance imaging: a case report. Iodine-enhanced CT images acquired in October 2018. a On unenhanced CT images, a slightly hyperdense and exophytic-growing nodule was observed (pathological analysis showed epithelioid angiomyolipoma) at the posterior aspect of the right kidney. b In arterial-phase CT images, the epithelioid angiomyolipoma was significantly enhanced. In addition, there were multiple small renal nodules (pathological analysis showed papillary adenomas) with poor enhancement in the bilateral kidneys. c, d On nephrographic and excretory-phase computed tomography images, the epithelioid angiomyolipoma (black arrow) was hypodense relative to the adjacent renal cortex. The papillary adenomas were iso- to hypodense in the renal cortex in the excretory phase

jmedicalcasereports.biomedcentral.com • CC-by-4.0

Ten-year

follow-up of renal adenomatosis with magnetic resonance imaging: a case report. Abdominal MRI performed in August 2020. a On axial T2-weighted images, multiple papillary adenomas were observed in the renal cortices of the bilateral kidneys (arrow and arrowhead). Progression of the tumors was evident based on the increased tumor size and tumor number. b, c On axial diffusion-weighted images and apparent diffusion coefficient maps, more renal adenomas were noted in the bilateral kidneys with diffusion restriction (arrow and arrowhead). The imaging features remained consistent with those seen 10 years earlier. d, e, f On axial dynamic contrast-enhanced T1-weighted images with fat suppression, papillary adenomas present isointensity relative to the renal parenchyma on unenhanced images and relatively poor contrast enhancement in the arterial and venous phases (arrow and arrowhead). These imaging characteristics remained consistent with those seen 10 years earlier

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Ten-year

follow-up of renal adenomatosis with magnetic resonance imaging: a case report. Abdominal MRI with contrast enhancement performed in January 2010. a On axial fat-saturated T2-weighted images, papillary adenomas present as well-defined hypointense nodules (arrow and arrowhead) in the bilateral renal parenchyma. b, c Papillary adenomas present high signal intensity (arrow and arrowhead) on axial diffusion-weighted (b-value: 800) images and low signal intensity (arrow and arrowhead) on the corresponding apparent diffusion coefficient maps, suggesting diffusion restriction. d, e, f On axial dynamic contrast-enhanced T1-weighted images with fat suppression, papillary adenomas present isointensity in the renal parenchyma on unenhanced images and relatively poor contrast enhancement in the arterial and venous phases (arrow and arrowhead)

jmedicalcasereports.biomedcentral.com • CC-by-4.0

Radiopaedia • CC-by-nc-sa 3.0 • de

Benign renal tumors were histologically classified according to the World Health Organization . This is the subset of entities in the 2016 WHO classification of renal tumors that are associated with an International Classification of Diseases for Oncology (ICD-O) behavior code of 0, indicating benign tumors. This article also separately includes entities with a behavior code of 1, indicating unspecified, borderline, or uncertain behavior. The remainder of entities in the WHO classification are considered malignant.