Which breast cancer subtypes are most aggressive and prone to spread?

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Aggressive Breast Cancer Subtypes Exhibit Higher Propensity for Recurrence and Distant Spread

Certain subtypes of breast cancer are inherently more aggressive and therefore carry a greater risk of recurrence and metastasis to distant parts of the body. Specifically, triple-negative breast cancer (TNBC) and HER2-positive breast cancer are identified as subtypes generally associated with a heightened likelihood of these adverse outcomes.
Triple-Negative Breast Cancer (TNBC)

Triple-negative breast cancer is characterised by the absence of three common receptors: oestrogen receptors (ER), progesterone receptors (PR), and HER2. This subtype tends to grow and spread more quickly than other types of breast cancer. Its aggressive nature means that it often presents a greater challenge in terms of treatment options, as it does not respond to hormonal therapies or treatments targeting the HER2 protein.
HER2-Positive Breast Cancer

HER2-positive breast cancer is defined by the overproduction of a protein known as human epidermal growth factor receptor 2 (HER2). This overproduction can accelerate the growth of breast cancer cells. While advancements in targeted therapies have significantly improved outcomes for HER2-positive breast cancer, it is still considered an aggressive subtype with a notable propensity for distant spread compared to hormone receptor-positive, HER2-negative breast cancers.
General Risk Factors for Metastasis

Beyond specific subtypes, the risk of metastasis is influenced by a combination of factors. These include the inherent genetic characteristics of the tumour, the extent of lymph node involvement at diagnosis, and the individual's response to initial treatments. Tumours that are more invasive or have already penetrated the lymphatic system are more likely to disseminate cancer cells to other organs.

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Which breast cancer subtypes are most aggressive and prone to spread?

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