N (%) Gender Male 16 (59.3) Female 11 (40.7) Age (years) <55 9 (33.3) ≥55 18 (66.7) GIST location Stomach 18 (66.7) Duodenum 4 (14.8) Jejunum 3 (11.1) Ileum 1 (3.7) Colon 1 (3.7) Tumor size ≤2 cm 2 (7.4) >2 cm 25 (92.6) Histological type Spindle cells 19 (70.4) Epitheloid cells 8 (29.6) Mutational status Exon 11 KIT 19 (70.4) Exon 9 KIT 8 (29.6) Mitotic rate <5/50 high power fields with tumor size <5 cm 13 (48.1) 6-10/50 high power fields with tumor size <5 cm 9 (33.3) >5/50 high power fields 5 (18.5) Resectability Resectable 23 (85.2) Unresectable 4 (14.8) Presence of metastasis at diagnosis 4 (14.8)

Table 2: The characteristics of the GIST patient population are presented according to gender, age group, GIST tumor location, tumor size, histological type, mutational status, mitotic rate, tumor resectability and presence of metastasis