¹⁸F-FDG PET in the Diagnosis and Treatment of Primary Central Nervous System Lymphoma

Figure 4

Contrast-enhanced T1-weighted MR (upper) and ¹⁸F-FDG PET (lower) images in PCNSL patients with atypical MR findings. MR images show a ring-like enhanced lesion in the right frontal lobe (a), multiple faint enhanced lesions in the right cerebral cortex and the corpus callosum (b), multiple small enhanced lesions in the bilateral frontal white matter and the corpus callosum (c), and no enhancing lesion in the brain (d). PET images show no ¹⁸F-FDG uptake in the lesions except for moderate ¹⁸F-FDG uptake in the right frontal cortex (arrow) in case (b).

(a)

(b)

(c)

(d)