Quick Answer: What causes HER2 positive cancer?

What triggers HER2-positive breast cancer?

This is caused by a mutation in the HER2 (human epidermal growth factor receptor 2) gene. When the HER2 gene mutates, it causes cells in the breast to grow and divide at an uncontrolled rate, leading to tumor growth.

What causes HER2 to mutate?

HER2-positive breast cancer is not inherited. Instead, it’s considered a somatic genetic mutation. This type of mutation occurs after conception.

What is the survival rate of HER2-positive cancer?

The 4-year survival rates are as follows: HR+/HER2-: 92.5% HR+/HER2+: 90.3% HR-/HER2+: 82.7%

Is HER2-positive breast cancer aggressive?

In about 1 of every 5 breast cancers, the cancer cells have extra copies of the gene that makes the HER2 protein. HER2 -positive breast cancers tend to be more aggressive than other types of breast cancer.

Is HER2-positive a death sentence?

Current treatment algorithms for invasive HER2-positive disease has transformed the face of a disease with a death sentence to one with prolonged and overall survival benefit.

Is chemo necessary for HER2-positive?

Trastuzumab and chemotherapy are even recommended for women with very small, HER2-positive breast cancers. Tumors as small as 0.5 cm often warrant such treatment. However, decisions must be individualized based on your own individual risk.

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Is it better to be HER2-positive or negative?

Is HER2-positive breast cancer good or bad? HER2-positive cancer tends to be poorer in terms of prognosis than HER2-negative cancer because: It grows faster. It is more likely to spread to the lymph nodes fast.

Is HER2-positive good?

About 25% of breast cancers are HER2-positive. HER2-positive cancers are a mix of good and bad news. The bad news is the tumors tend to grow more aggressively than those without the HER2 receptor. The good news is that like ER/PR-positive cancers, medicines can switch the HER2 growth receptor off.

Can HER2-positive become negative?

Your HER2 status can change as your cancer grows or returns. That is, HER2-positive cancer can become HER2-negative and vice versa. You and your doctor may decide to retest for HER2 over time or if your cancer comes back after treatment.

What is the life expectancy of HER2-positive metastatic breast cancer?

With a median follow-up of 48 months, median OS and PFS were 63 months (CI95%, 50-71), and 18 months (CI95%, 15-21) respectively. In 111 patients (26.3%) classified as LTR, median OS was 110 months (CI95%, 95-not reached) versus 56 months in non-LTR patients (CI95%, 47-68).

What is the most aggressive type of breast cancer?

Triple-negative breast cancer (TNBC) is considered an aggressive cancer because it grows quickly, is more likely to have spread at the time it’s found and is more likely to come back after treatment than other types of breast cancer. The outlook is generally not as good as it is for other types of breast cancer.

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