Morphologically, the two cell lines from NF1‐MPNST validated tumors (NF1‐08 and NF1‐09) were composed of small, polygonal cells that grew forming a monolayer without contact inhibition, similar to the morphology of other classic MPNST cell lines like S462 or ST88‐14 (Fig. S6A). Here, NF1 is linked to malignant peripheral nerve sheath tumor.