Brain Metastasis Mimicking Brain Abscess in ALK-Positive Non-Small-Cell Lung Cancer

Figure 1

(a) Pathological findings: lung cancer tissue after pulmonary resection (×400 at original magnification). (b) Chest CT taken at admission revealed consolidation and atelectasis in the right lower lobe and right pleural effusion. (c) A 5 mm cranial lesion was found by head MRI at admission (upper panel: T1-weighted MRI, lower panel: diffusion-weighted MRI). (d) Pathological findings: the brain lesion which was resected (×400 at original magnification). (e) Chest CT taken three weeks later showed that consolidation and atelectasis improved, revealing ground glass opacities and multiple cavitary lesions in the right lower lobe. (f) On day 27, the brain lesion increased to 14 mm and exacerbation of cerebral edema around the brain lesion was observed by head MRI (upper panel: T1-weighted MRI, lower panel: diffusion-weighted MRI).

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