Fig. 7
From: Imaging in metastatic breast cancer, CT, PET/CT, MRI, WB-DWI, CCA: review and new perspectives
65-year-old patient with HER2 positive invasive ductal carcinoma of the right breast with metastases to the brain, lung and bone. Resected right frontal lobe metastasis and left parietal lobe deposit recently treated with stereotactic radiotherapy. Axial post-contrast FLAIR sequence (a) demonstrates confluent signal abnormality within the left parietal lobe. Axial post-contrast T1W sequence (b) shows heterogenous enhancement at the site of treated metastasis in the left partial lobe. CCA (c) shows corresponding contrast accumulation (red arrow) at the site of contrast enhancement, unequivocal for radiation necrosis rather than persistent tumoral activity