Co‐expression of InRCA and madRNAi gave a similar rescue as either InRCA (InRCA;mCherryRNAi) or madRNAi(madRNAi;LacZRNAi) alone, suggesting that TGF‐β signalling likely acts downstream of insulin signalling in the fat body of tumour‐bearing animals. The gene discussed is INS; the disease is neoplasm.