Breast metastases originate from which of the following primary sites?

Breast metastases originate from which of the following primary sites?

• A. Lymphoma, Melanoma, Ovarian, Lung
• B. Prostate, Colon, Pancreas, Stomach
• C. Breast Cancer Only
• D. Liver, Kidney, Brain, Skin

Answer: (A)

Metastases to the breast come from tumors that originate outside the breast. The most common sources are lymphoma, melanoma, ovarian cancer, and lung cancer because these tumors are prone to spread hematogenously and can seed breast tissue. Such metastases often appear as multiple, well-circumscribed nodules and may be bilateral, which helps distinguish them from primary breast cancers that usually show spiculated margins and calcifications. Prostate, colon, pancreas, and stomach cancers are much less likely to metastasize to the breast, so they’re not typical origins for breast metastases.

Metastases to the breast come from tumors that originate outside the breast. The most common sources are lymphoma, melanoma, ovarian cancer, and lung cancer because these tumors are prone to spread hematogenously and can seed breast tissue. Such metastases often appear as multiple, well-circumscribed nodules and may be bilateral, which helps distinguish them from primary breast cancers that usually show spiculated margins and calcifications. Prostate, colon, pancreas, and stomach cancers are much less likely to metastasize to the breast, so they’re not typical origins for breast metastases.