ACTA1 and meningioma: Both cultures preserved the dual meso-neuroectodermal identity characteristic of meningothelial cells, exhibiting stable adherent growth, preserved contact inhibition and a coherent immunocytochemical profile, expressing vimentin, α-SMA, nestin, connexin-43 and cannabinoid receptors-reported here for the first time in grade 1 meningioma cultures-highlighting cannabinoid-related pathways as potential targets for exploration.