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. 2026 Sep 1;43(9):524–531. doi: 10.4274/balkanmedj.galenos.2026.2026-1-289

TABLE 2. Patient-Level Clinicopathological Data of Breast Cancer Patients Carrying Pathogenic ATM Variants.

No.

Patient ID

HGVSc

HGVSp

Effect

Ethnicity

Age at diagnosis

Family history for BC/OC

Localization

BC type

T

N

G

Stage

ER pos.

PR pos.

HER2 pos.

TN pos.

1

BC-255

c.67C > T

p.Arg23*

Stop gained

MK

34

Yes

Unilateral

Ductal

1c

1a

3

II A

No

No

No

Yes

2

BC-1767

c.67C > T

p.Arg23*

Stop gained

MK

40

No

Unilateral

Ductal

2

0

NA

IIA

Yes

Yes

Yes

No

3

BC-1997

c.67C > T

p.Arg23*

Stop gained

MK

54

No

Unilateral

NA

NA

NA

NA

NA

NA

NA

NA

NA

4

BC-2230

c.67C > T

p.Arg23*

Stop gained

MK

51

Yes

Unilateral

Lobular

2

1a

2

IIB

Yes

Yes

No

No

5

BC-2416

c.67C > T

p.Arg23*

Stop gained

MK

48

Yes

Unilateral

NA

NA

NA

NA

NA

NA

NA

NA

NA

6

BC-2871

c.67C > T

p.Arg23*

Stop gained

MK

54

Yes

Unilateral

Ductal

2

1

3

IIB

Yes

Yes

NA

No

7

BC-577

c.495_496 + 16del

p.?

Splice donor

AL

33

No

Bilateral

Ductal

4b

0

3

IIIC

Yes

Yes

Yes

No

8

BC-1396

c.495_496 + 16del

p.?

Splice donor

AL

61

Yes

Unilateral

Ductal

2

1

2

IIB

Yes

Yes

No

No

9

BC-656

c.1066-1G > A

p.?

Splice acceptor

MK

28

No

Unilateral

Lobular

2

3

3

IIIC

Yes

Yes

No

No

10

BC-1643

c.1066-1G > A

p.?

Splice acceptor

MK

32

Yes

Unilateral

Ductal

1c

2a

3

IIIA

Yes

Yes

No

No

11

BC-2415

c.1066-1G > A

p.?

Splice acceptor

MK

45

Yes

Unilateral

Ductal

2

2

3

IIIA

Yes

No

Yes

No

12

BC-1492

c.1564_1565del

p.Glu522Ilefs*43

Frameshift

MK

61

Yes

Unilateral

Ductal

2

1

2

IIB

No

No

Yes

No

13

BC-91

c.3576G > T

p.Lys1192=

Splice, synonymous

MK

37

Yes

Unilateral

Ductal

2

0

NA

NA

Yes

Yes

No

No

14

BC-2315

c.3576G > T

p.Lys1192=

Splice, synonymous

MK

37

Yes

Unilateral

Ductal

1c

x

2

IA

No

No

No

Yes

15

BC-2784

c.3576G > T

p.Lys1192=

Splice, synonymous

MK

34

Yes

Unilateral

Ductal

2

3

3

IIIC

Yes

Yes

No

No

16

BC-105

c.3603del

p.Phe1201Leufs*6

Frameshift

MK

40

Yes

Unilateral

Ductal

2

1

NA

NA

Yes

Yes

No

No

17

BC-160

c.3866delA

p.Lys1289Argfs*4

Frameshift

MK

39

Yes

Unilateral

Lobular

2

1

2

IIB

Yes

No

Yes

No

18

BC-1048

c.5005G > A

p.Glu1669Lys

Missense, splice

MK

37

No

Unilateral

Ductal

2

2a

3

IIIA

Yes

Yes

Yes

No

19

BC-1477

c.6115G > A

p.Glu2039Lys

Missense, splice

MK

41

Yes

Unilateral

Ductal

1c

1mi

2

IB

Yes

Yes

No

No

20

BC-1516

c.6889dup

p.Gln2297Profs*76

Frameshift

MK

52

Yes

Unilateral

Ductal

mi

0

3

IA

Yes

Yes

Yes

No

21

BC-865

c.8283_8284del

p.Gln2762Alafs*6

Frameshift

MK

34

Yes

Unilateral

Ductal

2

1a

3

IIB

Yes

Yes

Yes

No

22

BC-2490

c.8283_8284del

p.Gln2762Alafs*6

Frameshift

MK

38

No

Unilateral

Ductal

NA

NA

NA

NA

Yes

Yes

Yes

No

23

BC-1305

c.9139C > T

p.Arg3047*

Stop gained

MK

34

No

Unilateral

Ductal

2

2

2

IIIA

Yes

Yes

No

No

MK, Macedonian; AL, Albanian; PV, pathogenic variants; BC, breast cancer; OC, ovarian cancer; ER, estrogen receptor; PR, progesterone receptor; HER2/neu, human epidermal growth factor receptor 2; TN, triple negative; pos., positive; NA, not applicable; ATM, ataxia-telangiectasia mutated.