Tumor de Wilms: estudio morfológico, inmunohistoquímico y genético de un caso de nefroblastoma con diferenciación rabdomioblástica

Abstract

Wilms’ tumor is the most frequent primary kidney tumour in childhood, affecting one out of 10,000 children in the United States. It is usually a triphasic tumour with epithelial, blastemal and stromal components; however it can also contain anaplastic areas and differentiation into other tissues. Many genes have been described related to its development. In the present case, apart from the histopathology, we performed a pangenomic study using the Single Nucleotide Polymorphism (SNP) HumnCytoSNP-12 chip. A triphasic tumour with rhabdomyoblastic differentiation, only visible by immunocytochemistry, was observed. A Copy Neutral Loss of Heterozygosity (CNLOH) was present in the epithelial/mesenchymal area, located in (p15.5-p15.1) and in the blastemal area in (15.5-15.1) and (15.1-14.1). An elevated expression of genes in chromosome8 was also found.