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Table 1 Study characteristics and description of extracted data in the 45 included studies

From: Is punctate palmoplantar keratoderma type 1 associated with malignancy? A systematic review of the literature

Author

Year

Study design

Description of index cases

Number of individuals in the study reported with

(no. of families)

Number of index cases

Sex (M/F)

(no. of cases)

Age

(age in years)

Ethnicity/

nationality

Clinical (C) or molecular genetic (M) diagnosis

(no. of cases) (gene)

PPPK1

PPPK1 and malignancy

Elhaji [6]

2020

Family reports (18)

18

M(8), F(10)

NA

Canadian

C(7), M(11) (AAGAB)

52

9

Johnston [18]a

2020

Family report

1

F

80

NA

M (AAGAB)

 > 1

1

Charfeddine [12]

2016

Family reports (8)

18

M(11), F(7)

21–95

Tunisian

M (AAGAB)

62

1

Podder [19]

2015

Family report

1

M

66

NA

C

6

1

Elleuch [20]

2014

Family report

1

M

70

NA

C

38

3

Cui [5]

2013

Family reports (8)

Single cases

8

28

M(6), F(2)

NA

NA

Chinese

C(3),M(5) (AAGAB)

C(27),M(1) (AAGAB)

57

28

5

3

Pöhler [21]

2013

Family reports (6)

5b

M(1), F(4)

42–79

Scottish(4), English(1), Mexican(1)

M(AAGAB)

44

1

Kiritsi [22]

2013

Family reports (3)

4

F(2), NA(2)

46–75

NA

M (AAGAB)

 > 8

1

Vinod [23]

2012

Family report

1

M

65

NA

C

7

1

Pohler [24]

2012

Family reports (18)

17b

M(5), F(12)

NA

Scottish(12), Irish(1), Japanese(2), Tunisian(3)

M (AAGAB)

93

“a few”

O'Toole [25]

2012

Family report

1

F

54

NA

C

2

1

Mamai [26]

2012

Family reports (3)

1b

M

NA

Tunisian

C

54

?c

Guo [4]

2012

Family report

1

F

NA

Chinese

M (COL14A1)

9

1

Gao [27]

2005

Family report

1

M

47

Chinese

C

14

2

Lienemann [28]

2004

Family report

1

M

49

NA

C

2

1

Asadi [29]

2003

Family report

1

M

75

NA

C

2

1

Emmert [30]

2003

Family report

1

M

76

NA

C

3

1

Martinez-Mir [31]

2003

Family reports (3)

1b

M

83

Syrian(1), Arab–Israeli(1), Mexican(1)d

C

57

2e

Stevens [9]

1996

Family report

1

F

46

Irish

C

49

10

Bennion [8]

1984

Family report

1

M

43

‘white man’

C

8

3

Smith [32]f

1970

Cohort study

7

NAf

NAf

NAf

C

NAf

NAf

Shaffer [33]

1945

Family report

1

M

67

‘colored man’

C

5

1

Neuber [34]

1930

Single case

1

M

67

NA

C

1

1

        

 ~ 602

 ~ 50

Harjama [35]

2021

Cohort study

9 g

M(4), F(5)

NA

Finnish

M (AAGAB)

9

0

Klein [36]

2021

Family report

1

F

68

NA

M (AAGAB)

4

0

Pimenta [37]a

2019

Family reports (3)

3

F(3)

59–65

NA

M (AAGAB)

 ≥ 6

0

Zamiri [38]

2019

Family reports (16)

16

NA

NA

NA

M (AAGAB)

 > 30

0

Bukhari [39]

2019

Single case

1

M

59

NA

C

1

0

Monteiro [40]

2019

Family report

1

F

53

Caucasian

C

2

0

Panetta [41]

2017

Family report

1

M

55

Caucasian

C

2

0

Asemota [11]

2016

Single case

1

F

53

NA

C

1

0

Nomura [42]

2015

Family report

1

F

80

Japanese

M (AAGAB)

2

0

Li [43]

2014

Family report

1

F

48

Chinese

M (AAGAB)

7

0

Pai [44]

2012

Family report

1

M

52

NA

C

2

0

Rapprich [45]

2011

Sngle case

1

M

44

NA

C

1

0

Miljkovic [46]

2009

Family reports (11)

Single cases

62

4

M(38), F (28)

NA

Slovenia

C

66

0

Bchetnia [47]

2009

Family reports (5)

5

M(4), F(1)

NA

Tunisian

C

16

0

Cooke [48]

2007

Single case

1

M

50

NA

C

1

0

Erkek [49]

2007

Family report

1

M

41

NA

C

3

0

Oztas [10]

2007

Family report

1

M

70

NA

C

3

0

Kumari [14]

2006

Family report

1

M

8

NA

C

5

0

Kong [50]

2004

Family report

1

F

61

German

C

7

0

Schreiber [51]

1997

Single case

1

NA

56

NA

C

7

0

Hesse [52]

1993

Family report

1

M

48

Caucasian

C

4

0

Rustad [53]

1990

Cohort studyh

44

M(30), F(14)

NA

black(20), white(18), other(6)

C

44

0

        

 ~ 215

0

In total

1930–2021

Family report (24)

Family reports (10)

Single cases (6)

Cohort study (3)

mixturei (2)

1–62 (sum

 = 280)

M(126)

F(98)

NA(46)

1–95

 

C (31)

M (12)

Mixturei (2)

 ~ 817

50

  1. Bold marks the sum of the numbers above
  2. NA not available, M male, F female
  3. aConference abstract
  4. bSome family/families where no index case is marked
  5. cThe following information appears in the text ‘Person marked by asterisk are died by different types of cancers.’ However, we could not find any asterisk symbols. d) Family 3 (Mexican) was previously reported in an abstract by Davalos et al. [54]
  6. e‘some of his siblings died from unknown types of cancer, according to their relatives’. However, it is not stated whether his siblings had PPPK1
  7. fReport on a group of 47 subjects with palmar lesions, of whom 7 had keratosis only outside the creases [which may be suggestive of PPPK1]. However, descriptive data were only available for the entire group of subjects with palmar lesions and are therefore not entered in the table. The authors report on 3 subjects with cancer (basal cell epithelioma (NA,NA), adenocarcinoma of the prostate (M,NA), lymphoma (NA,NA)), but it is not clear whether these are from the 7 subjects with keratosis only outside the creases or from the entire group.
  8. gOnly subjects from the cohort with disease-causing variants in AAGAB are entered in the table as information on malignancy status was only available for this subgroup of subjects in the study
  9. hRustad et al.[53]: ‘Most patients denied knowledge of other family members…[with punctate keratosis]…and we did not attempt to examine family members’.
  10. iSingle cases and family reports in the same studies.
  11. jSingle cases and/or family reports with both clinical and molecular genetic verified diagnosis