Table 1.

Demographic, clinical, and histopathologic characteristics of the 44 treatment-naïve patients

Age at inclusion
 Median (range)65 (33–93)
Gender
 Female19 (43)
 Male25 (57)
Primary tumor localization
 Stomach36 (82)
 Small intestine6 (14)
 Oesophagus2 (5)
Median tumor size (range)a5.1 (2.5–20.0)
Median mitotic count (range)a3 (0–24)
Modified NIH risk classification
 Low risk12 (27)
 Intermediate risk7 (16)
 High risk15 (34)
 Metastatic10 (23)
Mutation analysis
KIT exon 1133 (75)
KIT exon 131 (2)
KIT exon 171 (2)
PDGFRA exon 121 (2)
PDGFRA exon 188 (18)
  • Number of patients and percentage (in parentheses) is shown unless otherwise indicated.

  • aData from patients with localized disease only.