regardless of the type of nephroblastomatosis complex , ie , renal nodular blastema , simple tubular metanephric hamartoma , sclerosing metanephric hamartoma with adenoma , or incipient wilms ' tumor , immunoreactivity for polysialic acid was found in the blastemal cells , but was undetectable in all other structural elements .
C0022646
renal
C1266045
metanephric