Conclusion
Breast cancer occurs when the cells in the breast divide uncontrollably. It is mainly caused by gene mutations. Not all tumours are malignant. So, It is important to visit your healthcare provider if you notice any lump or abnormal growth in your breast. Early detection increases the chances of successful treatment.
References;
[1] https://www.britannica.com/science/connective-tissue
[2] https://www.cancer.org/treatment/understanding-your-diagnosis/lymph-nodes-and-cancer.html
[3] https://medlineplus.gov/lungcancer.html
[4] https://www.nhs.uk/conditions/hormone-replacement-therapy-hrt/types/
[5] https://www.genecards.org/cgi-bin/carddisp.pl?gene=BRCA1
[6] https://www.cancer.gov/about-cancer/causes-prevention/genetics/brca-fact-sheet