Understanding Her2-Positive Breast Cancer

Breast cancer is a type of cancer that affects the cells in the breast. It is the second most common type of cancer in women, with an estimated 2.3 million new cases being diagnosed in 2020 alone (American Cancer Society, 2020). While there are various subtypes of breast cancer, one of the most aggressive types is Her2-positive breast cancer. In this article, we will discuss everything you need to know about Her2-positive breast cancer, from its causes and symptoms to its diagnosis and treatment options.

What is Her2-positive Breast Cancer?

Her2-positive breast cancer is a subtype of breast cancer that makes up approximately 20% of all breast cancer cases (Breastcancer.org, 2020). It is characterized by the overexpression or overproduction of a protein called Her2 (human epidermal growth factor receptor 2) on the surface of breast cancer cells.

Causes of Her2-positive Breast Cancer

The exact cause of Her2-positive breast cancer is still unknown, but researchers believe that it is a combination of both genetic and environmental factors. Some studies have shown that a family history of breast cancer and certain genetic mutations can increase the risk of developing Her2-positive breast cancer (National Breast Cancer Foundation, 2021).

Symptoms of Her2-positive Breast Cancer

Like other types of breast cancer, Her2-positive breast cancer may not show any symptoms in its early stages. As the cancer grows, common symptoms may include a lump or thickening in the breast or underarm, changes in breast size or shape, nipple discharge, or changes in the skin texture of the breast (Mayo Clinic, 2020).