Cancer : A chronic disease

Cancer is called a chronic disease. It evolves over a relatively long period of time. It is triggered by some exogenous factors such as virus, bacteria, carcinogen and endogenous factors like hormone disorder or depressed immune system. It is initiated mildly in unseen and unsuspected ways. Then, it progresses slowly and hidingly in the early stage. It becomes virulent in the later stage, letting unbound its malignant cells to spread from primary site to various other locations in the body, a process known as metastasis. Cancer makes the affected person psychologically weak, anxious, fearful and depressed. In the early stage, its symptoms are vague or mixed-up like melange, or similar to that of any other illness. If not diagnosed, treated and cured early, the disease dies only with the death of the affected. Conventional therapies provide  temporary or short term remission for a late stage disease which invariably recurs after the remission period.