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Table 1 The NIH consensus criteria and the 7th UICC/AJCC TNM staging system for gastric GISTs

From: Two staging systems for gastrointestinal stromal tumors in the stomach: which is better?

Tumor size
(cm)
Mitotic count
(/50 HPF)
NIH criteria UICC/AJCC TNM stagea
≤2 ≤5 Very low IA
>2, ≤5 ≤5 Low IA
>5, ≤10 ≤5 Intermediate IB
>10 ≤5 Intermediate II
≤2 >5 Intermediate II
>2, ≤5 >5 Intermediate II
>5, ≤10 >5 High IIIA
>10 >5 High IIIB
  1. HPF high-power fields
  2. aAll tumors with lymph node or other metastasis are classified as stage IV