In this book, the authors study the mutual interaction of cancer and its host body. The authors present the point of view that this interaction is mediated by human consciousness. Although the term cancer refers to undisciplined and uncontrollable cellular growth, a basal cell carcinoma of the skin is quite different from adenocarcinoma of the lung, prostate, or breast, brain tumours, lymphomas, leukaemias, and other malignancies. These all differ markedly with respect to growth rates, metastatic tendencies, and sensitivity to neuroendocrine or immune system influences, particularly those that might be modulated by stress. There are critical concerns when it comes to determining exactly how long a cancer has been present. If a lump in the breast is found to be malignant, when did the cancer start? A month, six months, or years before clinical detection? Such information would be crucial to establish any temporal relationship with antecedent.