PIGP and neoplasm: These findings are consistent with a later investigation into pediatric renal tumor differential diagnosis, using both C- and N-terminus targeted WT1 antibodies, which concluded that, although useful for diagnosis of malignant tumors in children and adolescents, WT1 protein expression (nuclear and/or cytoplasmic, depending on the tumor and antibodies used) is not exclusive to nephroblastoma, being also encountered in DSRC and malignant rhabdoid tumors [22].