Carcinoma breast with high incidence of involving opposite breast is –
**Core Concept**
The question is testing the association between the incidence of bilateral breast cancer and specific tumor characteristics. In the context of breast cancer, bilateral involvement is a significant concern, especially in younger women and those with a family history of breast cancer.
**Why the Correct Answer is Right**
The correct answer is associated with a genetic predisposition to breast cancer. Women with a BRCA1 or BRCA2 mutation are at an increased risk of developing breast cancer at a younger age and have a higher likelihood of bilateral breast cancer involvement. This is due to the tumor suppressor function of these genes, which, when mutated, lead to an accumulation of genetic errors and cancer development.
**Why Each Wrong Option is Incorrect**
**Option A:** Lobular carcinoma is a type of breast cancer, but it is not specifically associated with a high incidence of bilateral involvement compared to other types.
**Option B:** Ductal carcinoma is the most common type of breast cancer, but it is not specifically linked to bilateral involvement in the context of this question.
**Option C:** Invasive ductal carcinoma is a common subtype of breast cancer, but it does not have a specific association with bilateral involvement.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that women with a family history of breast cancer, particularly those with a first-degree relative diagnosed at a young age, are at an increased risk of developing bilateral breast cancer. This highlights the importance of genetic counseling and screening in high-risk individuals.
**Correct Answer: B. Invasive lobular carcinoma is known for its high incidence of bilateral involvement.**