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Table 1: 
Patients and imaging characteristics of the PCNSLs included in this study
Clinical Characteristics (n = 81)
Mean age (yr)61.6 (SD, 11.8)
Sex
 Male/female38/43 (46.9%/53.1%)
ECOG performance status at diagnosis (case No) (%)
 171 (87.7%)
 22 (2.5%)
 36 (7.4%)
 42 (2.5%)
Mean serum LDH level225.9 (SD, 59.9)
Mean CSF-total protein107.0 (SD, 103.0)
Initial treatment response (case No) (%)
 Treatment response (CR and PR)64 (79.0%)
 Treatment failure (SD and PD)17 (21.0%)
Imaging characteristics (case No) (%)
 Location
  Deepa69 (85.2%)
  Hemisphere12 (14.8%)
 Atypical findingsb (case No) (%)
  Positive14 (17.3%)
  Negative67 (82.7%)
  • Note:—CR, complete response; PR, partial response; PD, progressive disease; SD, stable disease.
  • ↵a Deep location: thalamus, basal ganglia, corpus callosum, periventricular area, cerebellum.
  • ↵b Atypical findings: presence of hemorrhage or necrosis.