VTN and neoplasm: The findings regarding the aforementioned lack of vitronectin expression in NB tumors were recently opposed, based on digital analyses of large cohorts of patient samples by Burgos-Panadero et al., pointing to a tumor cell origin of vitronectin in NBs and analyzing patterns of vitronectin deposition in relation to NB prognostic factors (see [38] and Section 2.2).