In the present context of specialization, it is possible that the doctor in charge of treatment will not be the same as the one who gave the diagnosis of cancer. This is the whole difficulty of the general practitioner’s intervention: he will perhaps have given the initial information and will be personally committed to a relationship of trust, while knowing that he will not be taking on the entire care of the case. He will often have to send his patient to a specialist colleague, whom he will be careful to present as a significant and competent source of support. The specialist, for his part, should also be personally committed, without ignoring the pre-existing network and the other contributors.