Table 1: Literature review: 18F-FDG and T/N ratio in PCNSL.

Study Age (range) T/N ratio

Kosaka et al. (2008) [15] 71
Kawai et al. (2010) [16]17265 (47–79) 2.54
Kawase et al. (2011) [17]13270 (54–80)
Makino et al. (2011) [18]14

Two patients were treated with dexamethasone before PET study.
2Seven patients are overlapped (same institution).