It may surprise you to inform that our bodies have the cancer cells. Cancer occurs when our body cells is damaged in some way and start to behave abnormally in growing and multiplying, not respecting its neighborhood and not carrying out its specific functions. This is cancer cells. The immune system of a healthy person simply isolates and destroys such foes before they develop to form a cancer mass. However the cancer cells become more resistant or can flourish because of our immune system become weak.
They may start to form cluster of “undifferentiated cell “. If the cells are not multiplying and do not pose immediate risk, the growth is called benign tumor. If, however the damaged cells start abnormally growth and tend to spread to others part of bodies, it is called malignant tumor.
In the fullness of time the growth of the cancer cells become cancer mass. Like other cells, they need food and nutrients to keep growth and so the mass start develops its own blood supply to provide this. This is known as angiogenesis. Depending on how big and where the cancer mass is, symptoms may become apparent. There are some possible sign and symptoms may occur included: a new lump, abnormal bleeding, a prolonged cough, unexplained loss of weight, and a change in bowel movements among others. While these unlikely signs may indicate cancer, they may also occur due to other issues.These ‘primary’ cancers have different names, depending on the kind of issues they occur in and their location. There are over 100 different known cancers that affect humans.
Cancers are classified by the origin of the tumor. These types include:
- Carcinomas ( carc = cancer, oma = tumour): Most of the human cancer is fall in this group. Cancer arises from epithelial cells. This group includes nearly all developing in the breast, prostate, lung, pancreas and colon.
- Melanomas (melano = black): It is a tumor of melanin-forming cells; it typically associated with skin cancer.
- Sarcoma: it is a general term for any cancer arising from muscle cells or connective cells; for example osteogenic sarcomas (osteo = bone, genic = origin), which is most frequent type of childhood cancer which destroy bone tissues (connective tissues) and eventually spread around body.
- Leukaemia : thesis cancer of blood-forming organs characterized by rapid growth and distorted development of leukocytes (white blood cells).
- Lymphoma: this is a malignant disease of lymphatic tissue; for example is Hodgkin’s disease.
- Germ cell tumor: Cancers derived from pluripotent cells, most often presenting in the testicle or the ovary.
- Blastoma: Cancers derived from immature “precursor” cells or embryonic tissue. It is more common in children than in older adults.
‘Primary’ cancer is rarely likely to be fatal. At some point, a more mobile ‘metastatic’ cancer cell may arise. These metastatic cells can leave the existing cancer mass and spreading to other parts of body through bloodstream or lymphatic vessels. They can fall on in different parts of the body and start multiplying, as the result it what we know as “secondary’ cancer. These ‘secondary’ cancers are more insidious and hard to treat and they tend to spread and grow more quickly. Consequently, the average chance of surviving once ‘secondary’ cancer appears is much lower.