About Cancer
About Cancer
Cancer
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What is Cancer ?
The human body is composed of numerous cells that undergo a cycle of replication and renewal. The body has a built-in mechanism that ensures these cells are kept in check and do not behave abnormally. However, in certain cases, certain cells deviate from this process and start to multiply uncontrollably, leading to the development of cancer. Cancer cells can also evade the natural surveillance mechanisms of the body, thereby allowing them to spread to other parts of the body through the bloodstream or lymphatic channels.
Types of Tumours
Cancer tumours can be divided into three groups: benign, malignant or precancerous
Carcinomas
These tumours arise from epithelial cells that line organs and tissues in the body, and are the most common type of cancer. Examples include breast cancer, lung cancer, and colon cancer.
Sarcomas
These tumours arise from mesenchymal cells that make up connective tissue such as bone, muscle, and cartilage. Examples include osteosarcoma and leiomyosarcoma.
Carcinomas
These tumours arise from epithelial cells that line organs and tissues in the body, and are the most common type of cancer. Examples include breast cancer, lung cancer, and colon cancer.
Lymphomas
These tumours arise from lymphatic tissue, which is part of the immune system. Examples include Hodgkin's lymphoma and non-Hodgkin's lymphoma.
Leukemias
These tumours arise from blood-forming cells in the bone marrow and can affect the production and function of blood cells. Examples include acute lymphoblastic leukemia and chronic myeloid leukemia.
Neuroendocrine tumours
These tumours arise from cells that produce hormones and neurotransmitters, and can occur in a variety of organs including the pancreas, lung, and gastrointestinal tract. Examples include carcinoid tumours and neuroblastoma.
Germ cell tumours
These tumours arise from germ cells, which are the cells that give rise to eggs and sperm. Examples include testicular cancer and ovarian germ cell tumours.
Skin cancers
These tumours arise from cells in the skin and can be divided into two main types: melanoma and non-melanoma skin cancers such as basal cell carcinoma and squamous cell carcinoma.
Types of Cancers?
There are many different types of cancer, each with its own unique set of characteristics and symptoms. Some of the most common types of cancer include lung cancer, breast cancer, prostate cancer, and colorectal cancer. Other types of cancer include skin cancer, lymphoma, leukemia, and brain cancer.