Likewise, FN1 was expressed in all tumors, but less than 30% of the cells in neurofibromas and more than 70% of the cells in MPNST exhibited antibody binding.
Furthermore, cells which actively express the genes for type I and III collagens and fibronectin, the major components of the abundant extracellular matrix of neurofibromas, were localized using in situ hybridizations.