PMC8463768_01
MRI of the brain. (A) DWI revealing a 2.8-cm tubular shaped heterogeneously enhancing mass within the right parietal lobe with extensive perilesional edema. There is irregular and nodular rim enhancement with some areas of restricted diffusion. (B) Apparent Diffusion Coefficient (ADC) map.
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MRI of the brain revealed a heterogeneously-enhancing 2.8-cm mass with irregular, nodular rim enhancement and extensive perilesional edema (Fig. 1).
PET/CT image demonstrating pronounced mediastinal lymphadenopathy in the right paratracheal, precarinal and subcarinal regions with markedly increased FDG activity.
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Evaluation with PET-CT demonstrated markedly increased FDG activity in both the left lower lobe mass with associated satellite nodules and the right apical mass as well as metastatic mediastinal and left peribronchial lymphadenopathy (Fig. 2).
Brain lesion biopsy. Low power images showing an abscess with adjacent brain parenchyma (star). The surrounding brain parenchyma shows reactive gliosis on higher power.
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Gram-staining revealed gram-positive branching rods surrounded by many neutrophils (Fig. 3).