Introduction to cancer
Cancer is an ‘abnormal growth of cells’. The cancer cells continuously multiply in spite of lack of ‘space’ and ‘nutrition’. Cancer cells can be differentiated from the other healthy cells in being different in shape, improper function and the capacity to spread to other parts of the body. The study of cancer and tumors is called as ‘Oncology’. Cancer is not a single disease but is a group of diseases.
Tumors
can be benign or malignant. Benign tumors grow slowly and do not
spread. When tumors are malignant, they are termed as ‘cancer’ and can
cause harm including “death”. The ‘malignant’ nature of cancer is due to
its locally invasive nature (tumor invading the surrounding cells) and
metastatic nature (tumor invading the other tissues in the body).
The
original tumor is called as the primary tumor. The cells of the primary
tumor travel through the circulatory system and lymphatic system to
form new tumors called as secondary tumors in other organs.
Occurence of Cancer in different groups (Epidemiology)
Prevalence
of cancer in different regions of the world varies depending on the
type of cancer occurring in that particular region. Epidemiological
studies suggest that breast cancer andpostrate cancer are common in the developed countries of the world, whereas cervical cancer and
stomach cancer occur more frequently in developing countries. Lung
cancers seem to have high incidence in both developed and developing
countries.
The
differences in the prevalence of cancer in different regions of the
world can be explained through heredity, medical practices, lifestyle
changes and environmental exposures like different diets, tobacco and
pesticides. Studies suggest that the incidence of colon cancer is seen
more in people who are obese.
ADVICE TO ALL LADIES
If there is anything you are experiencing around your breast region, you are advice to visit a hospital nearest to you.
Health is better than health...............
Prevalence
of cancer in different regions of the world varies depending on the
type of cancer occurring in that particular region. Epidemiological
studies suggest that breast cancer andpostrate cancer are common in the developed countries of the world, whereas cervical cancer and
stomach cancer occur more frequently in developing countries. Lung
cancers seem to have high incidence in both developed and developing
countries.
The
differences in the prevalence of cancer in different regions of the
world can be explained through heredity, medical practices, lifestyle
changes and environmental exposures like different diets, tobacco and
pesticides. Studies suggest that the incidence of colon cancer is seen
more in people who are obese.
ADVICE TO ALL LADIES
If there is anything you are experiencing around your breast region, you are advice to visit a hospital nearest to you.
Health is better than health...............
0 comments:
Post a Comment