Efficacy and safety of preoperative immunotherapy in patients with mismatch repair-deficient or microsatellite instability-high gastrointestinal malignancies

Table 1 Patient, tumor and treatment characteristics

All cases	N (%)
Sex, n (%)
Male	26 (72.2)
Female	10 (27.8)
Age, yr (median)	52.0
ECOG
0	2 (5.6)
1	30 (83.3)
2	4 (11.1)
Tumor location, n (%)
Stomach	3 (8.3)
Duodenum	3 (8.3)
Colorectal cancer	30 (83.3)
Clinical TNM stage, n (%)
II-III	27(75.0)
IV	9 (25.0)
Lynch syndrome
Yes	16 (44.4)
No	20 (55.6)
No clear	0 (0.0)
MMR and MSI status
Consistent	30 (83.3)
Inconsistent	6 (16.7)

ECOG: Eastern Cooperative Oncology Group; MMR: Mismatch repair; MSI: Microsatellite instability; TNM: Tumor-node-metastasis.