TABLE 2

Gastric Cancer Recurrence and Diagnostic Performance of 18F-FDG PET

ParameterAll subjects (n = 368)18F-FDG–avid tumor group* (n = 236)18F-FDG–nonavid tumor group† (n = 132)P
Recurrence (%)72 (19.6)46 (19.5)26 (19.7)0.962‡
Mean duration to recur ± SD (mo)18.9 ± 13.317.3 ± 13.321.8 ± 12.90.167
Follow-up PET scans within 3 mo of clinical decision of recurrence (%)6342210.645‡
PET sensitivity for recurrence (%)
 Including all recurrences45/63 (71.4)34/42 (81.0)11/21 (52.4)0.018‡
 Excluding recurrences in remnant stomach or anastomosis site41/58 (70.7)32/39 (82.1)9/19 (47.4)0.006‡
Follow-up PET scans without recurrence514310204
PET specificity for recurrence97.3%97.1%97.5%0.758‡

  • ↵* Initial primary gastric tumor uptake (+) and SUVmax ≥ 4.

  • ↵† Initial primary gastric tumor uptake (−) or SUVmax < 4.

  • ↵‡ Pearson χ2 test.

  • ↵ t test.

  • Data in parentheses are percentages.