What is Cancer?
What is cancer?
Cancer isn’t just one disease – it’s an umbrella term for a whole group of diseases that all behave in a similar way. There are more than 100 types of cancer, most of which are named after the part(s) of the body where they form. At its most basic, a cancer is a disease in which the cells that make up our bodies begin to multiply in an unusual or uncontrolled manner.
When these abnormal cells start to spread, they can sometimes form together into clumps known as tumors. Tumors can be non-cancerous (benign), but when they’re cancerous they can invade new parts of the body and spread (malignant).
It’s important to know that there can be major differences between types of cancer, and the same type of cancer can present differently in different people. Some cancers form tumors; others, like leukemia, might not. Some cancers will spread or invade other parts of the body, while others won’t. For the purposes of this article, we’ll discuss cancer in two broad categories: invasive cancer and noninvasive cancer.
Invasive Cancer
What many people imagine when they think of cancer – cancer that spreads, either through tumors or some other way, from one part of the body to the next.
Noninvasive Cancer
Also known as metastatic cancer or carcinoma in situ, is cancer that stays in the place it originated. Although cancer in this form doesn’t invade other parts of the body, it’s often treated or operated upon as it has a risk of doing so in the future.
Both invasive and noninvasive cancers are covered by many critical illness insurance policies, which we’ll address later in the article.