Of these, only COL1A2 was elevated in the CM from the tumor-associated group 1, but not in the non-tumor-associated group 2, hiPSC-sensory neurons, as well as in mouse Nf1+/neo but not Nf1+/1809 DRG neurons (2.4–3.2-fold increase; Fig. 5G, H and Supplementary Fig. 6D–H). The gene discussed is COL1A2; the disease is neoplasm.