Fig. 12
From: Systemic treatment in breast cancer: a primer for radiologists
67-year-old woman with metastatic HER2/neu-positive breast cancer being treated with trastuzumab. Patient had prior radiotherapy in right breast. Axial contrast-enhanced lung window CT image before (a) and after (b) treatment with trastuzumab shows interval appearance of peripheral ground-glass opacities in right middle lobe (arrows in b) in radiation field suggestive of radiation recall pneumonitis