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Table 1 Characteristics of included studies in meta-analysis

From: Prognostic value of tumor-infiltrating lymphocytes in DCIS: a meta-analysis

Year

First author

Country

Type of DCIS

Number of participants

TIL’s detection method

Cutoff of TIL’s point

Subtype of TILs

Treatment

Median follow up

Outcome

Reference

2006

Gaynor J. Bates et al.

UK

p-DCIS

62

IHC

15

FOXP3+ TILs

S & AT (RT/ HT)

5.4 y

AR

[20]

2016

G. Pruneri et al.

Europe

DCIS

1488 (set1: n = 1391; set2: n = 620)

HE

set1: < 1% vs. 35–50%

total p-TILs

S & AT (RT/ HT)

8.2 y

IR

[8]

set2: < 1% vs. > 50%

2015

Elizabeth Thompson et al.

USA

p-DCIS & i-DCIS

total p-TILs (n = 27) PD-L1+ TILs (n = 27)

HE & IHC

50%

total p-TILs

S & AT

80 m

IR

[9]

PD-L+ TILs

2017

Shona Hendry et al.

Australia

p-DCIS

total p-TILs (n = 138) PD-L1+ TILs (n = 79) PD-L1+ TC(n = 79)

HE & IHC

TILs: 2%. PD-L1: 1%

total p-TILs

S & AT (RT/ HT)

TILs: 89 m PD-L1:39 m

IR

[7]

PD-L1+ TILs

PD-L1+ TC

2018

Michael S. Toss et al.

UK

training set:

training set

HE

training set: 5%

training set:

training set:

training set: 161 m

IR

[14]

p-DCIS

(n = 150)

total p-TILs

S/ S & RT

validation set:

validation set

validation set: 20

validation set:

validation set:

validation set: 109 m

p-DCIS

(n = 534)

total t-TILs

S/ S & RT

2019

Rajiv Dave et al.

Australia

p-DCIS

423

HE

5%

total p-TILs

BCS

119 m

IR

[21]

2020

Marie Colombe Agehozo et al.

Netherlands

p-DCIS

total p-TILs (n = 466) PD-L1+ TILs (n = 115) PD-L1+ TC(n = 115)

HE & IHC

30%

total p-TILs

BCS/ MAS

98 m

IR

[22]

PD-L1+ TILs

PD-L1+ TC

2019

Farbod Darvishian et al.

USA

p-DCIS

69

HE

45%

total p-TILs

BCS

6.7 y

IR

[11]

2019

Mieke Van Bockstal et al.

Belgium

p-DCIS

211

HE

50%

total p-TILs

S & AT (RT/ HT)

124 m

IR

[10]

2020

Aye Aye THIKE et al.

Singapore

DCIS

total p-TILs (n = 198) CD4+ TILs (n = 198)

HE & IHC

20%

total p-TILs

S (BCS/ MAS)

TILs: 7.9 y CD4+: 7.2 y

AR

[23]

CD4+ TILs

2020

Michael S. Toss et al.

UK

p-DCIS

total p-TILs (n = 508) FOXP3+ TILs(n = 406) PD-L1+ TILs (n = 383) CD4+ TILs (n = 403) CD8+ TILs (n = 402)

HE & IHC

20

total t-TILs

BCS

unknown

IR

[12]

FOXP3+ TILs

PD-L1+ TILs

CD4+ TILs

CD8+ TILs

2020

Alberto Farolfi et al.

Italy

p-DCIS

496

HE

5%

total p-TILs

S/ S & RT

56.4 y

IBE

[15]

2021

Fei-Fei Xu et al.

China

p-DCIS &

135

HE

5

total t-TILs

BCS/ BCS & RT

53 m

IR

[13]

m-DCIS

  1. UK United Kingdom, USA United States of America, p-DCIS pure DCIS, i-DCIS pure DCIS mixed with IDC, m-DCIS pure DCIS mixed with microinvasive cancer, HE Hematoxylin and eosin staining, IHC Immunohistochemistry staining, TILs Tumor-infiltrating lymphocytes, vt-TILs Stromal touching TILs, p-TILs percentage of stromal TILs, TC Tumor cell, S Surgery, BCS Breast conserving surgery, MAS Mastectomy, AT Adjuvant therapy, RT Radiation therapy, HT Hormonal therapy, IR Lipsilateral recurrence; AR All kinds of recurrence, IBE Ipsilateral breast cancer events