Which event is associated with fat necrosis according to the material?

Which event is associated with fat necrosis according to the material?

• A. Radiation therapy
• B. Chemotherapy
• C. Hormone therapy
• D. Immunotherapy

Answer: (A)

Fat necrosis in the breast is most classically linked to radiation therapy because ionizing radiation injures adipose tissue and small blood vessels, leading to adipocyte death, fat saponification, and an inflammatory/fibrotic response. Over time this can form oil cysts and calcifications, creating focal masses that may mimic cancer on imaging. This late effect of radiotherapy helps explain why radiation therapy is the event most associated with fat necrosis. Other systemic therapies—chemotherapy, hormone therapy, and immunotherapy—have different tissue effects and are not the typical causes of fat necrosis in the breast.

Fat necrosis in the breast is most classically linked to radiation therapy because ionizing radiation injures adipose tissue and small blood vessels, leading to adipocyte death, fat saponification, and an inflammatory/fibrotic response. Over time this can form oil cysts and calcifications, creating focal masses that may mimic cancer on imaging. This late effect of radiotherapy helps explain why radiation therapy is the event most associated with fat necrosis. Other systemic therapies—chemotherapy, hormone therapy, and immunotherapy—have different tissue effects and are not the typical causes of fat necrosis in the breast.