What is the most common type of breast cancer?

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What is the most common type of breast cancer?

The main idea here is that invasive ductal carcinoma is the most common breast cancer type because it begins in the milk ducts and then invades surrounding tissue, which is what defines an invasive cancer. It accounts for the vast majority of breast cancers, roughly around 70–80% of invasive cases. Ductal carcinoma in situ, while a frequent finding on screening, is non-invasive and confined to the ducts, so it isn’t classified among invasive cancers in the same way and is less common as a histologic category of breast cancer. Lobular carcinoma is less common than invasive ductal carcinoma, and Paget disease refers to a nipple presentation often linked to underlying DCIS or invasive cancer, but it is comparatively rare.

The main idea here is that invasive ductal carcinoma is the most common breast cancer type because it begins in the milk ducts and then invades surrounding tissue, which is what defines an invasive cancer. It accounts for the vast majority of breast cancers, roughly around 70–80% of invasive cases. Ductal carcinoma in situ, while a frequent finding on screening, is non-invasive and confined to the ducts, so it isn’t classified among invasive cancers in the same way and is less common as a histologic category of breast cancer. Lobular carcinoma is less common than invasive ductal carcinoma, and Paget disease refers to a nipple presentation often linked to underlying DCIS or invasive cancer, but it is comparatively rare.

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