I seem to recall that efforts to demonstrate reproducibility in published cancer studies were not going well. Some of that was due to problems even attempting

I seem to recall that efforts to demonstrate reproducibility in published cancer studies were not going well. Some of that was due to problems even attempting to reproduce them, but one wonders if some of the rest is due to problems like this. I have the feeling that we are using terms like "lung cancer" and "skin cancer" to refer to a large group of diseases that are not only not the same, but perhaps qualitatively different.