How is fat necrosis diagnosed?

How is fat necrosis diagnosed?

• A. Indistinguishable from carcinoma even with imaging studies; if imaging not typical do core needle biopsy
• B. Clearly distinguishes from carcinoma on imaging
• C. Requires biopsy in all cases
• D. Diagnosed by ultrasound only

Answer: (A)

Fat necrosis in the breast often results from trauma or surgery and can mimic cancer on imaging. Because there is substantial overlap in ultrasound, mammography, and even MRI features between fat necrosis and malignancy, imaging alone cannot reliably distinguish the two. When imaging findings aren’t classic for fat necrosis, the safest and most definitive step is to obtain tissue with a core needle biopsy to confirm whether cancer is present. In cases with classic, benign-appearing fat necrosis and stability over time, some clinicians may opt for observation, but imaging doubt generally leads to biopsy.

Fat necrosis in the breast often results from trauma or surgery and can mimic cancer on imaging. Because there is substantial overlap in ultrasound, mammography, and even MRI features between fat necrosis and malignancy, imaging alone cannot reliably distinguish the two. When imaging findings aren’t classic for fat necrosis, the safest and most definitive step is to obtain tissue with a core needle biopsy to confirm whether cancer is present. In cases with classic, benign-appearing fat necrosis and stability over time, some clinicians may opt for observation, but imaging doubt generally leads to biopsy.