Clinical significance of programmed cell death-ligand expression in small bowel adenocarcinoma is determined by the tumor microenvironment

Table 1 Clinicopathological data of patients with small bowel adenocarcinoma

	No. of cases (%)
Age
≤ 68	27 (54.0)
> 68	23 (46.0)
Sex
Female	15 (30.0)
Male	35 (70.0)
Site
Duodenum and jejunum	45 (90.0)
Ileum	5 (10.0)
Histology
WD, MD	41 (82.0)
PD, Muc	9 (18.0)
Depth of invasion
pT1-2	14 (28.0)
pT3-4	36 (72.0)
Lymph node metastasis
Absence	27 (54.0)
Presence	23 (46.0)
Distant metastasis
Absence	37 (74.0)
Presence	13 (26.0)
Peritoneal seeding
Absence	40 (80.0)
Presence	10 (20.0)
Chemotherapy
Absence	27 (54.0)
Presence	23 (46.0)
TNM stage
I	14 (28.0)
II	13 (26.0)
III	10 (20.0)
IV	13 (26.0)

WD: Well differentiated; MD: Moderately differentiated; PD: Poorly differentiated; Muc: Mucinous adenocarcinoma.