TABLE 1:

Individual MR imaging signs of tumor recurrence versus radiation necrosis results

Corpus CallosumMidline SpreadSubependymal SpreadMultiple LesionsSpreading WavefrontSeptum PellucidumPathologic Diagnosis
Totals
    Presence416364Necrosis
    Absence8116968Necrosis
    Presence10211932Tumor
    Absence513461213Tumor
P value*.121.26.12.13.36
Sign favors diagnosis of:TumorNeitherTumorTumorNecrosisNecrosis
    Sensitivity (%)66.7N/A73.3605033.3
    Specificity (%)66.7N/A507581.386.7
Positive predictive value (%)71.4N/A64.77566.766.7
Negative predictive value (%)61.5N/A606068.461.9
Accuracy (%)66.7N/A63676863
  • * Fisher’s exact 2-tailed test.