PMC7649332_01
Magnetic resonance imaging pre- and post-treatment. (A,B) Pre-treatment imaging demonstrated an avidly enhancing 11 x 7 x 12 mm lesion along the mesial surface of the right frontal lobe within the cingulate sulcus with surrounding vasogenic edema. (C,D) Post-treatment imaging with complete radiographic resolution of the lesion and associated vasogenic edema.
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Surveillance magnetic resonance imaging (MRI) of the brain (1 mm cuts) demonstrated a single, avidly enhancing 11 x 7 x 12 mm lesion along the mesial surface of the right frontal lobe within the cingulate sulcus with surrounding vasogenic edema (Figures 1A,B). Repeat MRI (1 mm cuts) 3 months after initiating pembrolizumab demonstrated complete radiographic resolution of the intracranial lesion and associated vasogenic edema without any new interim findings (Figures 1C,D).