Table 2 Breed, age, female to male ratio and frequent locations of the most common cutaneous tumor types. HFI—Higher frequency interval (age interval with the highest frequency for a specific tumor histotype). The number 0 means less than 1 year-old

Mast cell tumor

(n = 269)

Labrador retriever

72

22.86

Range = 1–16

Mode = 10

Median = 9

HFI = 7–11

1: 0.81

Hindlimb (21.2%)

Multicentric (12.3%)

Abdominal (8.9%)

Mixed

69

7.60

Boxer

41

30.15

Cutaneous mast cell tumor

(n = 244)

Labrador retriever

67

21.27

Range = 1–16

Mode = 10

Median = 9

HFI = 7–11

1: 0.83

Hindlimb (20.5%)

Multicentric (12.3%)

Abdominal (8.6%)

Mixed

64

7.05

Boxer

37

27.21

Benign soft tissue tumor

(n = 115)

Mixed

55

6.06

Range = 0–17

Mode = 10

Median = 10

HFI = 7–12

1: 0.42

Multicentric (24.4%)

Forelimb (11.3%)

Pectoral (10.4%)

Labrador retriever

27

8.57

golden retriever

3

5.77

Lipomas

(n = 86)

Mixed

41

4.52

Range = 1–17

Mode = 10

Median = 10

HFI = 8–12

1: 0.39

Multicentric (31.4%)

Pectoral (11.6%)

Forelimb/Costal (10.5%)

Labrador retriever

21

6.67

golden retriever

3

5.77

Fibromas

(n = 25)

Mixed

11

1,21

Range = 0–13

Mode = 7

Median = 8.5

HFI = 7–13

1: 0.56

Abdominal (20.0%)

Forelimb (12.0%)

Dorsal (8.0%)

Labrador retriever

5

1,59

poodle/Rottweiler^#

2

2,86/8.00

Sebaceous gland tumor

(n = 96)

Mixed

24

2.64

Range = 4—18

Mode = 13

Median = 12

HFI = 10–14

1: 0.88

Multicentric (27.1%)

Neck (9.4%)

Ear (8.3%)

Labrador retriever

23

7.30

cocker spaniel

16

34.04

Sebaceous adenoma

(n = 62)

Mixed

18

1.98

Range = 4–18

Mode = 13

Median = 12

HFI = 11–14

1: 0.72

Multicentric (33.87%)

Neck (8.1%)

Cranial (6.5%)

Labrador retriever

11

3.49

cocker spaniel

8

17.02

Sebaceous epithelioma

(n = 34)

Labrador retriever

12

3.81

Range = 7–17

Mode = 10/12

Median = 12

HFI = 10–14

1: 1.27

Ear (23.5%)

Multicentric (14.7%)

Facial (11.8%)

cocker spaniel

8

17.02

Mixed

6

0.66

Vascular tumor

(n = 94)

Mixed

33

3.63

Range = 3–14

Mode = 7/8

Median = 8.5

HFI = 6–11

1: 0.92

Hindlimb (11.7%)

Multicentric (10.6%)

Abdominal (9.6%)

Labrador retriever

15

4.76

Boxer

13

9.56

Hemangioma

(n = 68)

Mixed

20

2.20

Range = 3–14

Mode = 7/10

Median = 9

HFI = 6–10

1: 0.94

Hindlimb (13.2%)

Abdominal (13.2%)

Forelimb/Dorsal (10.3%)

Labrador retriever

13

4.13

Boxer

12

8.82

Hemangiosarcoma

(n = 23)

Mixed

11

1.21

Range = 4–14

Mode = 8

Median = 8

HFI = 6–11

1: 0.77

Perigenital (21.7%)

Multicentric (17.4%)

Abdominal (8.7%)

Dogo Argentino

2

28.57

German shepherd/pit bull^#

2

2.22/7.14

Soft tissue sarcomas

(n = 90)

Mixed

41

4.52

Range = 2–18

Mode = 10

Median = 10

HFI = 9–12

1: 0.96

Hindlimb (24.4%)

Forelimb (23.3%)

Multicentric (10.0%)

Labrador retriever

11

3.49

Boxer

9

6.62

Peripheral nerve sheath tumor

(n = 39)

Mixed

19

2.09

Range = 2–18

Mode = 12

Median = 10

HFI = 10–13

1: 0.86

Forelimb (23.1%)

Hindlimb (20.5%)

Multicentric (10.3%)

Boxer

4

2.94

German shepherd

4

4.44

Perivascular wall tumor (n = 20)

Mixed

11

1.21

Range = 2–15

Mode = 9/11/12

Median = 10

HFI = 9–12

1: 0.82

Hindlimb (40.0%)

Forelimb (25.0%)

Dorsal (10.0%)

Boxer

4

2.94

Boerboel

1

100.00*

Hepatoid gland tumor

(n = 88)

Mixed

46

5.07

Range = 2–18

Mode = 9/10/11

Median = 11

HFI = 9–14

1: 6.33

Buttock area (76.1%)

Multicentric (9.1%)

Tail (6.8%)

Labrador retriever

6

1.90

Estrela mountain Dog

4

20.00

Hepatoid adenoma

(n = 57)

Mixed

30

3.30

Range = 2–18

Mode = 9

Median = 10

HFI = 9–14

1: 4.18

Buttock (75.4%)

Tail (8.8%)

Multicentric (7.0%)

Labrador retriever

5

1.59

cocker spaniel

3

6.38

Tumor like lesions (n = 71)

Acrochordon

Boxer

15

11.03

Range = 1–17

Mode = 11

Median = 9

HFI = 7–11

1: 0.82

Abdominal (14.1%)

Forelimb (14.1%)

Multicentric (12.7%)

Mixed

14

1.54

Labrador retriever

10

3.17

Hair follicle tumor

(n = 69)

Mixed

29

3.19

Range = 2–18

Mode = 6

Median = 8

HFI = 6–9

1: 1.16

Hindlimb (15.9%)

Dorsal (14.5%)

Multicentric (14.5%)

German shepherd

7

7.78

bassett hound

5

38.46

Trichoepithelioma

(n = 28)

Mixed

16

1.76

Range = 4–14

Mode = 6

Median = 7

HFI = 5–11

1: 0.87

Multicentric (25.0%)

Dorsal (17.9%)

Hindlimb (14.3%)

bassett hound

2

15.38

boxer/golden retriever^#

2

1.47/3.85

Trichoblastoma

(n = 20)

Mixed

4

0,44

Range = 2–13

Mode = 9/13

Median = 9

HFI = 9–13

Cranial (30.0%)

Ear (15.0%)

Facial (15.0%)

German shepherd

3

3,33

1: 3.00

cocker spaniel

2

4,26

Histioproliferative disorders

(n = 61)

Mixed

20

2.20

Range = 0–14

Mode = 1

Median = 2

HFI = 0–3

1: 0.85

Ear (16.4%)

Facial (11.5%)

Pectoral (11.5%)

Boxer

10

7.35

French bulldog

7

17.07

Histiocytoma

(n = 58)

Mixed

20

2.20

Range = 0–14

Mode = 1

Median = 1

HFI = 0–3

1: 1.07

Ear (17.2%)

Facial (12.1%)

Pectoral (12.1%)

Boxer

9

6.62

French bulldog

7

17.07

Hamartomas (n = 56)

Mixed

18

1.98

Range = 3–18

Mode = 7/11

Median = 10

HFI = 7–12

1: 0.75

Multicentric (16.1%)

Forelimb (10.7%)

Abdominal (8.9%)

Labrador retriever

13

4.13

Boxer

12

8.82

Epidermal tumor

(n = 60)

Mixed

14

1.54

Range = 3–17

Mode = 8/9/10

Median = 9

HFI = 7–10

1: 1.22

Multicentric (20.0%)

Forelimb (15.0%)

Facial (8.3%)

Labrador retriever

12

3.81

Dogo Argentino

6

85.71

Squamous cell carcinoma

(n = 32)

Mixed

8

0.88

Range = 3–15

Mode = 9/10

Median = 10

HFI = 9–12

1: 1.13

Multicentric (31.3%)

Facial (9.4%)

Forepaw (9.4%)

Dogo Argentino

5

71.43

Labrador retriever

4

1.27