MSX1 and melanoma: In addition, we identified Mesenchyme (COL1A1+), Endothelium (SOX18+, KDR+), proliferating cells (TOP2A+, MKI67+), and some off‐target cells; Glial (MSX1+, SOX2+), Melanoma (PMEL+, PLP1+), and Neuron (DLL3, HES6).