Diseases & Conditions

What is Cancer? Learn the Basics and Types

Cancer is not exactly a disease but a collection of several conditions. It happens when the cells of a person’s body start to divide and become zombie cells spreading all around the body.

How does Cancer develops

This condition can happen practically anywhere and spread throughout the body without treatment. When the zombie cells start spreading because they do not die, sometimes create growth of mass called tumors. These tumors are tissue, which holding these zombie cells can spread cancer throughout the body or eventually become very toxic to the body, creating pain and exerting nerve damage and so on.

Some types of cancer such as leukemia don’t cause tumors. But those types that do may spread these zombie cells via blood or the lymph system. Malign tumors they are called, and can form new tumors wherever the cells end up. This means they are incredibly dangerous and infectious.

Benign tumors on the other hand, do not spread or invade throughout the body. However, these tumors are often larger and harder to remove than malign tumors. They mostly happen in organs than merely anywhere. And when they are taken off the body, they don’t grow back again. Yet, they can also threaten life and health if not treated in time.

How does Cancer affects the body?

Cancer is mostly genetic which means it appears on your body since you are born and grows with time. However, it does not start affecting your health until it is already too advanced and the affected part of your body starts functioning defectively.

Some cancer cells are actually taken from direct DNA damage. This could be environmental exposure to UV rays, radioactive exposure, tobacco smoke, and chemical reactions towards toxic substances or elements.

Cancer and mutations

No matter the reason, cancer is almost unique depending on the person. With time, cancer also grows differently from person to person, and even within the same tumor, cells may start having totally different changes and become a totally new type of cancer.

These changes in cancer cells are called mutations. DNA mutations can be either the cause or result of cancer, and they are as common as cancer itself. Actually, almost everyone suffers from DNA mutations in their body, so that’s why many people say everyone has cancer but not everyone suffers it.

7 Types of Cancer

Cancer is not a disease that happens and that’s it. Cancer actually has many reasons and ways to appear, which means it affects the body in different ways as well. Here are the different types of cancer you need to know about:


This is the most common type of cancer in the world, and comes from the zombie epithelial cells. These cells are the ones that cover the surface of many parts of the body, including the skin, colon, breast, kidneys, bladder, intestines, lungs, and more.

Carcinoma is divided in four groups: Adenocarcinoma, basal cell carcinoma, squamous cell carcinoma, and transitional cell carcinoma.

Adenocarcinoma happens in the cells that produce mucus or fluids, located in organs such as the prostate, breast, colon, and even the lungs. Basal cell carcinomas, on the other hand, appear in the inner layer of epidermis (skin) only. While squamous cell carcinoma appears in the outer surface of the skin, but can also appear in the bladder, kidneys, intestines, stomach, and even lungs. And finally, transitional cell carcinoma happens in the bladder, urethra, ureters, kidneys, and other organs.

Carcinoma is heavily dangerous, as it is the most common type of cancer, it is also the the responsible for many deaths every year.


Sarcoma is the type of cancer that forms in the soft tissues of the body including muscle, fat, tendons, blood vessels, nerves, joints, and lymph vessels.

The most common type of sarcoma is osteosarcoma, which is cancer on bones. This is another highly dangerous type of cancer, and one of the hardest to treat.


Everyone knows leukemia as the cancer that happens on blood or bone marrow. It does not cause tumors or protuberances like other types of cancer, instead it produces zombie white cells that build up on the bone or blood and cause cancer effects.

Leukemia happens in four different ways: Acute or Chronic, depending on how fast it develops. And in Lymphoblastic or Myeloid, according to the type of blood cell the caner attacks first.


When the lymphocytes (white blood cells) start becoming zombie cells and don’t do their work, you could be suffering from a lymphoma. This type of cancer builds up in the nodes and lymph vessels around the body or organs, sometimes creating what many professionals call lymphomas.

These lymphomas can be Hodgkin when the cancer appears from B cells. Then there is Non-hodgkin, when the cancer starts in lymphocytes and is normally formed from T cells.


When the cancer begins in plasma cells, it is called a myeloma or multiple myeloma. It is similar to leukemia as it happens in the bone marrow as well, yet it does create tumors and other similar solids around bones in the whole body.


Melanoma is a type of cancer directly related to the skin. It forms in the melanocytes, the part of the skin that creates melanin that gives color to the dermis. Some times of melanomas can also appear in the eyes, which causes loss of sight and other similar deficiencies.

Brain and Spinal Tumors

Sometimes, cancer appears in form of tumors without affecting cells directly. These tumors can grow from nowhere and not be dangerous until it is too late. They normally affect the nervous system and grow from nerve cells instead, and can be either benign or malignant.

Most brain and spinal tumors are fatal, as they are almost impossible to cure. Luckily, it is one of the rarest types as well.

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