Luminal A breast cancer accounts for approximately what percentage of cases?

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Multiple Choice

Luminal A breast cancer accounts for approximately what percentage of cases?

Explanation:
Luminal A breast cancer is the most common molecular subtype, defined by estrogen receptor positivity, HER2 negativity, and a low proliferation rate. Because many breast cancers are ER-positive and HER2-negative, this group makes up a large portion of cases, often around half to three-quarters depending on the classification method. So a estimate of about 50-73% fits best. This subtype also tends to have a more favorable prognosis and responds well to endocrine therapy, which is consistent with its prominence in clinical data. The other ranges either understate or overstate its typical share in most populations.

Luminal A breast cancer is the most common molecular subtype, defined by estrogen receptor positivity, HER2 negativity, and a low proliferation rate. Because many breast cancers are ER-positive and HER2-negative, this group makes up a large portion of cases, often around half to three-quarters depending on the classification method. So a estimate of about 50-73% fits best. This subtype also tends to have a more favorable prognosis and responds well to endocrine therapy, which is consistent with its prominence in clinical data. The other ranges either understate or overstate its typical share in most populations.

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