Earlier quoted context omitted.
I'm confused: Some subjects, which included prison inmates, developed tumors from the injected cells. and later When I asked, “What if they had?” he calmly replied, “If they did, we’d just cut it out.” So did they or didn't they?
Wild ass guess: Some patients developed localized tumors at the injection site, which were eradicated by the host immune system. Thus some could have tumors without really developing a disease we would call cancer Edit: I've actually seen this exact reaction with subcutaneous injections of tumor cells in mice.
Makes sense. Thanks for clarifying the difference.