What is the difference between conventional treatments and natural or alternative cancer treatments

To a conventional physician, the tumor is the enemy.
Cancer is viewed as a local disease, namely the tumor. By cutting out the tumor, irradiating it, or flooding the body with toxic (and often carcinogenic) drugs, the conventional physician hopes to destroy the tumor and restore the patient to health.
But all too often, the cancer is still present and has metastasized, or re-occurs.
In contrast, the alternative physician regards cancer as one that involves the whole body.
The tumor is merely a symptom and the cancer treatment aims to correct the root causes of disease in the whole body.
Dr. Josef Issels, who successfully treated many 'incurable' cancer patients, stated:
'.. those who believe cancer is a local disease [that is, conventional physicians] think that the tumor comes first and only afterwards follows the generalised illness; those who think it is a generalised disease of the body [alternative physicians] believe that first comes the illness, and only afterwards the tumor' from this basically different way of looking at cancer, [the two types of physicians] take separate paths towards the solution to cancer.
Cancer is a general disease of the whole body from the outset.
The tumor is a symptom of that illness.
It is my contention, based on twenty-five years of clinical experience with over eight thousand cancer patients, that only by recognising the disease is, and always has been, one affecting the whole body from the outset, can it be more effectively arrested. By adopting that principle, the statistics of survival can be improved from the present grim position where eight out of every ten patients die having received all possible surgery, radiotherapy and chemotherapy.'