Brain tumors in children: Cancer cells become less aggressive as they migrate within the tumor
Certain brain tumors in small children contain cells that develop very similarly to normal brain cells and others that have already developed malignantly, depending on where they are located within the tumor.
https://www.gesundheitsindustrie-bw.de/en/article/press-release/hirntumoren-bei-kindern-krebszellen-werden-auf-ihrer-wanderung-im-tumor-weniger-aggressiv