What is Cancer, Tumor? Its types.

Cancer is the disease of uncontrolled division of abnormal cells. The name (cancer) given to collection of related diseases. In all types of cancers, some of the body cells begin to divide without stopping and spread into surrounding tissues.

Cancer can start anywhere in the human body, which is made up of trillion of cells. Normally, human cells grow and divide to form new cells as the body needs them. When cells grow old and becomes damaged then they die, and new cells take their place. As cells become more and more abnormal, old or damaged cells survive when they should die. These extra cells can divide without stopping and may form growths called tumors.


Mostly Cancers form solid material called tumors, which are masses of tissue. Cancers of the blood, such as leukemia, general do not form solid tumors.

Cancerous tumors are malignant, which means they can spread into, or invade, nearby tissues. In addition, as these tumors grow, some cancer cells can break off and travel to distant places in the body through the blood or the lymph system and form new tumors far from the original tumor.

Types of Cancer:

More than 200 types of cancer have been identified worldwide but i will mention some common types in Pakistan.

  1. Skin Cancer

Cancer can form in the skin cells on any part of the body, though most commonly on skin that’s been exposed to the sun. There are several types of skin cancers including squamous cell skin cancer, found in the flat cells on the top of the skin, and basal cell skin cancer, found in the round cells deeper inside skin’s outer layer. Most commonly, skin cancer affects older people or people who have a compromised immune system.

  1. Lung Cancer

Lung cancer strikes the cells inside the lining of the lungs. There are two primary types of lung cancer — small cell and non-small cell lung cancer.

  1. Breast Cancer

This is by far the most common cancer in women. Majority of breast cancer patients are women, about 1,900 cases are diagnosed in men each year says American cancer society.

  1. Prostate Cancer

This is the most common cancer to affect men, most often men over age 50. The prostate gland is a part of the reproductive system in men and is found at the base of the bladder, near the rectum. This type of cancer develops in the tissues inside the prostate gland says Dr. Lichtenfeld (MD deputy chief medical officer of American Cancer society.

  1. Bladder Cancer

Bladder cancer is one of the most common cancers. Bladder cancer occurs in men more frequently than it does in women and usually affects older adults, though it can happen at any age.

  1. Kidney Cancer

The kidneys are the organs that help to excrete waste from the body in the form of urine. Cancer can form inside the tissues or ducts of the kidneys. Although kidney cancer develops mainly in people over 40, one type of kidney tumor usually affects young children.

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Fawad's Chemistry

Hope you fine. I'm Fawad and author of this blog "Chemanalogy". Love to write on Chemistry. Currently teaching A Levels, O Levels and University Chemistry offline as well as online. Connect to chemanalogy community by subscribing via email.