Mammography Jeopardy Practice Test

The most commonly diagnosed breast cancer is?

Lobular carcinoma Ductal carcinoma in situ Invasive ductal carcinoma Inflammatory breast cancer

Correct Answer:

Invasive ductal carcinoma

Explanation:

The main idea here is the relative frequency of breast cancer types. Invasive ductal carcinoma is the most commonly diagnosed form because most breast cancers originate in the milk ducts and then invade surrounding breast tissue, making this histologic type by far the most prevalent—roughly seven to eight in ten invasive breast cancers. Ductal carcinoma in situ is a non-invasive condition confined to the ducts, so while common, it’s not counted among invasive cancers and therefore isn’t the most frequently diagnosed invasive type. Lobular carcinoma is less common than IDC, and inflammatory breast cancer is rare. So, the best answer is invasive ductal carcinoma due to its dominant prevalence among breast cancer cases.

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