Question
Which type of breast cancer is most likely to be bilateral?
The correct answer is
Lobular carcinoma of breast
Breast Cancer Bilateral Risk
The question asks to identify the type of breast cancer most likely to occur in both breasts (bilateral).
Understanding Bilateral Breast Cancer
Bilateral breast cancer refers to the occurrence of cancer in both the left and right breasts. Certain types of breast cancer have a higher propensity for this.
Lobular Carcinoma Characteristics
- Lobular carcinoma of the breast is known for its distinct pattern of growth. Unlike ductal carcinomas that often form a distinct lump, lobular cancer cells tend to spread in a single-file pattern within the breast tissue.
- This infiltrative and diffuse growth pattern means the cancer can be present in multiple areas of one breast (multifocal) and can also occur in the opposite breast (bilateral) more frequently than other types.
- Studies indicate that invasive lobular carcinoma (ILC) has a significantly higher rate of bilaterality compared to invasive ductal carcinoma (IDC).
Comparison with Other Types
- Infiltrating duct carcinoma (IDC) is the most common type but less likely to be bilateral than ILC.
- Paget's disease primarily affects the nipple and areola and is often associated with an underlying ductal carcinoma.
- Medullary carcinoma is a less common type, typically presenting as a distinct mass and not specifically associated with a high bilateral rate.
Therefore, lobular carcinoma of the breast is the type most frequently associated with bilateral presentation.
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