Introduction:

One of the manifestations of metabolic syndrome is obesity, which is in turn related to the development of cancer. However, in four years we had not found any case of malignant neoplasms in animals with metabolic syndrome.

Objective:

Describe the development of a malignant renal tumor in an experimental metabolic syndrome model.

Methods:

The experimental biomodel was made applying a 35% saccharose solution to 50 male weaned Wistar rats for 20 weeks. The diagnosis of nephroblastoma was achieved by necropsy with morphological observation of the renal lesion.

Results:

Upon metabolic syndrome confirmation, a palpable mass was detected in the abdomen of one of the cases. Macroscopic observation revealed a grayish brown tumor in the lower pole of the right kidney with hemorrhaging and cystic changes. Histological examination found alterations typical of mixed nephroblastoma with blastema, mesenchymal and epithelial components.

Conclusions:

This is the first time a description is provided in an anatomopathological study of a case of nephroblastoma in a rat with experimental metabolic syndrome.

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