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The disease caused by an uncontrolled
What Is Cancer? division of abnormal cells in a part of the
body
·Cancer is not one disease. It is a group of more than 100
different and distinctive diseases.
·Its main characteristics are the uncontrolled growth of the cells in
the human body
& the ability of these cells to migrate from the original site and spread
to distant sites. If the spread is not controlled, cancer can result in
death.
·Cancer can involve any tissue of the body and have many different forms
in each area.
·Most cancers are named after the type of cell or organ in which they start.
Unit 1.4…read more

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Causes of cancer....
A majority of cancers are caused by changes in the cell's DNA
because of damage due to the environment.
Environmental factors that are responsible for causing the initial
mutation in the DNA are called carcinogens, and there are many
types. For e.g. it is found in cigarettes.
Unit 1.4…read more

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Types of cancer?
There are several different types of cancers
·Carcinomas are cancers that are found in the epithelium (the layer of
cells covering the body's surface and lining the internal organs and various
glands).
·Carcinomas can be subdivided into two types: One is a cancer that develops in
an organ or a gland,
·whilst the other cell carcinomas refer to cancers that originate in the skin.
·90% of human cancers fall into this category.
Unit 1.4…read more

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Types of cancer?
·Cancers of the blood and lymph glands are called leukaemia's and lymphomas
·Gliomas are cancers of the nerve tissue
· Sarcomas are cancers of the supporting tissues of the body, such as bone,
muscle and blood vessels.
Unit 1.4…read more

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Causes & The major risk factors for cancer
are: tobacco, alcohol, diet, Sex,
Symptoms? infectious agents, family history,
occupation, environment and
·Cancer is a pollution.
progressive disease,
and goes through several stages.
·Each stage may produce a
number of symptoms.
·Some symptoms are produced
early and may occur due to a
tumour that is growing within an
organ or a gland.
·As the tumour grows, it may
press on the nearby nerves,
organs, and blood vessels.
·This causes pain and some
pressure which may be the
earliest warning signs of cancer.…read more

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