Benign vs. Malignant Tumors: Understanding the Difference

Many people think of cancer when they hear the word “tumor.” But not all tumors are cancerous.

If you have been diagnosed with a tumor or you suspect you may have one, it’s important to know about the different types of tumors and the risks they pose.

What Is a Tumor?

A tumor is a cluster of abnormal cells that develop into a lump or growth. Depending on the type of cells it contains, a tumor can be benign, precancerous/premalignant, or malignant.

• A benign tumor does not contain cancerous cells.
• A precancerous or premalignant tumor contains abnormal cells that could become cancerous.
• A malignant tumor contains cancerous cells.

What Causes Tumors?

It’s usually not possible to pinpoint the exact cause of a tumor, but certain risk factors may increase a person’s chances of developing one. These include (but are not limited to):

• Genetics
• Age
• Exposure to toxins, radiation, or chemicals
• Chronic inflammation or infection
• Local trauma or injury
• Diet
• Stress

It’s important to see a doctor or oncology specialist right away if you see or feel an abnormal lump or growth anywhere on your body. If you are diagnosed with a tumor, your healthcare provider will determine whether it is benign or malignant and develop a treatment plan for you.
The infographic below explores the differences between benign and malignant tumors.

Sources:

1. https://www.cancer.gov/about-cancer/understanding/what-is-cancer
2. https://www.cancer.gov/about-cancer/causes-prevention/risk
3. https://www.healthline.com/health/cancer/difference-between-benign-and-malignant-tumors
4. https://www.verywellhealth.com/what-does-malignant-and-benign-mean-514240