# 🧬 Cancer-Causing Genes: The Key Players You Should Know

**URL:** <https://www.medboundhub.com/t/cancer-causing-genes-the-key-players-you-should-know/10327>\
**Category:** General\
**Tags:** mbbs, futuredoctors, medical\
**Created:** [November 13, 2025, 4:51pm UTC](https://www.medboundhub.com/t/cancer-causing-genes-the-key-players-you-should-know/10327 "2025-11-13T16:51:37Z")\
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**Page:** 1

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**Author:** ![shreyasvishwakarma](https://yyz1.discourse-cdn.com/flex033/user_avatar/www.medboundhub.com/shreyasvishwakarma/32/2280_2.png) [@shreyasvishwakarma](https://www.medboundhub.com/u/shreyasvishwakarma)\
**Post date:** [November 13, 2025, 4:51pm UTC](https://www.medboundhub.com/t/cancer-causing-genes-the-key-players-you-should-know/10327/1 "2025-11-13T16:51:37Z")

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Cancer develops when certain genes that control cell growth become damaged or altered. These cancer-linked genes fall into two major categories: oncogenes (genes that drive uncontrolled growth) and tumor suppressor genes (genes that normally prevent cancer but stop working when mutated).

## **🔥Major Oncogenes (Cancer-Promoting Genes)**

- RAS genes (KRAS, NRAS, HRAS): Among the most common drivers of lung, colon, and pancreatic cancers.
- MYC: Pushes cells to grow rapidly; linked to breast cancer, leukemia, and lymphoma.
- BRAF: Known for the V600E mutation in melanoma and thyroid cancer.
- HER2/ERBB2: Causes aggressive breast cancers when overexpressed.

## **🛑Major Tumor Suppressor Genes (When Lost, Cancer Grows)**

- TP53: The most frequently mutated gene in human cancers; fails to stop damaged cells from dividing.
- BRCA1 & BRCA2: Increase the risk of breast, ovarian, pancreatic, and prostate cancers.
- APC: A key gene in colon cancer development.
- PTEN: Regulates cell growth; mutations are linked to breast, thyroid, and endometrial cancers.
- RB1: Loss leads to retinoblastoma and other tumors.

## **🩺Why These Genes Matter**

Identifying mutations helps doctors:

- Predict cancer risk,
- Choose targeted therapies (like HER2 inhibitors or BRAF blockers),
- Personalize early screening and prevention.

💡 Understanding your genetic risks can transform cancer from a silent threat into a preventable one.

MBH/AB