Mixed epithelial and stromal tumor of the kidney

Case contributed by Dr James Sheldon


Known Hodgkin's Lymphoma. Incidental finding on initial staging CT.

Patient Data

Age: 27 years
Gender: Male

Exophytic, heterogeneous right renal lesion is identified. There is cortical disruption and extension into the posterior pararenal space.

No lymphadenopathy within the abdomen or pelvis.

Heterogeneously hypoechoic 60mm lesion in the right kidney was biopsied.

Case Discussion

Histology revealed features consistent with Mixed epithelial and stromal tumor (MEST) of the kidney, which is an uncommon and recently recognized distinct neoplasm that should be distinguished from other renal neoplasms.

It is typically seen as a multiloculated cystic renal mass with a variable proportion of solid and cystic components and containing internal septa. The latter may demonstrate heterogeneous and delayed contrast material enhancement.

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Case information

rID: 26149
Published: 2nd Dec 2013
Last edited: 14th Aug 2019
System: Urogenital
Inclusion in quiz mode: Included

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