Table 2 Clinicopathological characteristics of 434 Norwegian patients with confirmed GIST
From: Diagnostic and prognostic markers for gastrointestinal stromal tumors in Norway
Gender | |
Male | 219 (51%) |
Female | 215 (49%) |
Age at primary diagnosis, mean (range) | 64.8 years (19–94) |
Localization of primary tumor | |
Esophagus | 1 (<1%) |
Stomach | 212 (49%) |
Small bowel | 148 (34%) |
Colon | 10 (2%) |
Rectum | 23 (5%) |
Omentum/mesentery | 7 (2%) |
Unknown locations | 33 (8%) |
Size, mean (based on 306 cases with available data) (range) | 8.9 cm (1.0–30) |
Cellular features | |
Spindle cells | 320 (74%) |
Epithelioid cells | 45 (10%) |
Spindle and epithelioid cells | 69 (16%) |
Focal atypia | 118 (27%) |
Diffuse atypia | 71 (16%) |
Necrosis | 43 (10%) |
Mitosis per 50 high-power field, mean (range) | 10.6 (0–276) |
