I don't think it is biologically plausible at all that a common chemical exposure exists. It is possible, just unlikely. It also doesn't match up with what we k

I don't think it is biologically plausible at all that a common chemical exposure exists. It is possible, just unlikely. It also doesn't match up with what we know about pollutant chemicals being a wide range of compounds, nor the broad range of cancers seen with other known pollutant chemicals. I would be far more likely to believe that a large number of unrelated cancers in an area were caused by pollutant carcinogens, than a small number of rare cancers. I don't know if there is an elevated rate of cancer in this area, but I assume not since it would be the first thing that anyone looking at this rare cancer cluster would look for.