Differences Between Tumours
Definition
Tumour
A tumour is an abnormal mass of cells resulting from uncontrolled cell division.
- Not all tumours are the same.
- They differ in their growth rates, ability to spread, and potential to cause cancer.
You do not need to memorise the term "apoptosis," just understand what it means.
Benign Tumours Are Localized and Non-Cancerous
- Growth Characteristics:
- Slow-growing and often remain localized.
- Cells are usually well-differentiated, resembling normal cells.
- Invasion and Metastasis:
- Do not invade nearby tissues or spread to other parts of the body.
- Encapsulated by a fibrous tissue, which keeps them contained.
- Health Impact:
- Generally harmless unless they press on vital organs or nerves.
- Can often be removed surgically with a low risk of recurrence.
Don’t assume all tumours are cancerous. Only malignant tumours cause cancer, while benign tumours do not.
Primary vs. Secondary Tumours
- Primary Tumour
- The original site where abnormal cell division begins.
- Can be benign or malignant.
