So you are saying that rats fed genetically modified tomatoes developed cancerous lesions and what are the implications towards human health?
It is not possible to say. Humans and rats have many things in common, but there are also differences. Industry often plays both sides of this issue. If their product shows no harm to lab animals they use it to assert the safety of their product. If their product DOES show harm to lab animals, they say that it means nothing because humans are not lab animals.
There are 3 possibilities and 2 of them are not good for humans.
1)The risks are the same for humans, 2) The risk to humans is less, 3) the risk to humans is greater.
Testing done on humans however will always be problematic because it is so much more difficult to control all variables of the experiment. (Differences in lifestyle: diet, exercise, exposure to other potential carcinogens etc) I personally would not bet my life on the safety of these products.
To earlier poster: you do not know what the risks of these products are, nobody does because they have not been adequately tested.