The present inventors revealed a TTF-1-specific oncogenic process by elucidating the molecular mechanism regulated by the master regulatory factor TTF-1. The present inventors focused on the elucidation of the essence of the lineage-specific survival signal which is a novel canceration signal. Thus, the present inventors found that the expression of ROR1, which is a receptor tyrosine kinase, is induced by the master regulatory factor TTF-1, and demonstrated the presence of a characteristic canceration signal transduction system.
