Table 4 Tumors with >50% IDO expression

From: Indoleamine 2,3-dioxygenase in endometrial cancer: a targetable mechanism of immune resistance in mismatch repair-deficient and intact endometrial carcinomas

Case

Age at diagnosis

Stage

Grade and histology

IDO expression

PD-L1 expression

MMR status

1

44

IIIC2

Grade 1 endometrioid

Tumor: >50%

immune: 6–10%

Tumor: 6–10%

immune: 11–25%

MSH2/6 loss, confirmed MSH2 mutation

2

57

IIIA

Grade 1 endometrioid

Tumor: >50%

immune: 1–5%

Tumor: 1–5%

immune: 6–10%

PMS2 loss, germ line untested

3

39

IA

Grade 2 endometrioid

Tumor: >50%

immune: 1–5%

Tumor: 1–5%

immune: 1–5%

PMS2 loss, confirmed PMS2 mutation

4

79

IB

Grade 2 endometrioid

Tumor: >50%

immune: 1–5%

Tumor: <1%

immune: 26–50%

MLH1/PMS2 loss, MLH1 methylation