Cancer is a general
term for many diseases in which abnormal cells divide without control.
abnormal growths cancerous?
No. Abnormal growths
(Tumors) that aren't cancer are called benign. Benign tumors
can cause problems – they can grow very large and press on healthy
organs and tissues, but, they cannot grow into (invade) other tissues.
Because they cannot invade, they also cannot spread to other parts
of the body (metastasize). These tumors are almost never life threatening.
stages of cancer are there?
It depends on which
cancer you are talking about and which staging system the doctor is
using. Some types of cancer have more than one type of staging system.
Most types of cancer have 4 stages, numbered 1 - 4. Often doctors
write the stage down in roman numerals i.e. I-IV.
Stage 1 - a cancer
is relatively small and contained within the organ it started in.
Stage 2 - a cancer
which has not started to spread into surrounding tissue, but is larger
than in stage 1. Sometimes stage 2 means that cancer cells have spread
into lymph nodes close to the tumor.
Stage 3 – a
cancer that may have started to spread into surrounding tissues and
there are cancer cells in the lymph nodes in the area.
Stage 4 – a
cancer that has spread from where it started to another body organ.
This is also called secondary or metastatic cancer.
problematic is cancer?
is growing in epidemic proportions. WHO warns that by year 2015, there
will be 10 million deaths due to cancer. The majority of new cancer
cases are now in low- and middle-income countries. Most of the poor
African countries do not have the resources to fight cancer. Multiple
health challenges posed by AIDS/HIV, malaria and tuberculosis (TB)
make the scenario worse. The most common cancers worldwide are lung,
breast, colon and rectum, stomach and prostate. Breast or cervix cancer
is the most common tumor affecting women in almost all countries.
Cancer that causes the most deaths is lung cancer. The cancers most
common in developing countries are those that have a poor prognosis;
lung, stomach, liver and esophagus. Liver cancer is also very common
for men in several African countries, although Kaposi Sarcoma
has become the most common cancer in 13 countries that are severely
affected by the AIDS epidemic.