Skip to main content

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

From: Retrospective study of canine cutaneous tumors submitted to a diagnostic pathology laboratory in Northern Portugal (2014–2020)

Tumor histotypes
(n = number of cases)
3 most affected breeds Age (years) Female to male ratio Location
(region)
Breed n % of all affected breeds Occurrence within breed, %
Mast cell tumor
(n = 269)
Labrador retriever 72 26.77 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 25.65 7.60
Boxer 41 15.24 30.15
Cutaneous mast cell tumor
(n = 244)
Labrador retriever 67 27.46 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 26.23 7.05
Boxer 37 15.16 27.21
Benign soft tissue tumor
(n = 115)
Mixed 55 47.83 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 23.48 8.57
golden retriever 3 2.61 5.77
Lipomas
(n = 86)
Mixed 41 47.67 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 24.42 6.67
golden retriever 3 3.49 5.77
Fibromas
(n = 25)
Mixed 11 44.00 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 20.00 1,59
poodle/Rottweiler# 2 8.00 2,86/8.00
Sebaceous gland tumor
(n = 96)
Mixed 24 25.00 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 23.96 7.30
cocker spaniel 16 16.67 34.04
Sebaceous adenoma
(n = 62)
Mixed 18 29.03 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 17.74 3.49
cocker spaniel 8 12.90 17.02
Sebaceous epithelioma
(n = 34)
Labrador retriever 12 35.29 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 23.53 17.02
Mixed 6 17.65 0.66
Vascular tumor
(n = 94)
Mixed 33 35.11 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 15.96 4.76
Boxer 13 13.83 9.56
Hemangioma
(n = 68)
Mixed 20 29.41 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 19.12 4.13
Boxer 12 17.65 8.82
Hemangiosarcoma
(n = 23)
Mixed 11 47.83 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 8.70 28.57
German shepherd/pit bull# 2 8.70 2.22/7.14
Soft tissue sarcomas
(n = 90)
Mixed 41 45.56 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 12.22 3.49
Boxer 9 10.00 6.62
Peripheral nerve sheath tumor
(n = 39)
Mixed 19 48.72 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 10.26 2.94
German shepherd 4 10.26 4.44
Perivascular wall tumor (n = 20) Mixed 11 55.00 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 20.00 2.94
Boerboel 1 5.00 100.00*
Hepatoid gland tumor
(n = 88)
Mixed 46 52.27 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 6.82 1.90
Estrela mountain Dog 4 4.55 20.00
Hepatoid adenoma
(n = 57)
Mixed 30 52.63 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 8.77 1.59
cocker spaniel 3 5.26 6.38
Tumor like lesions (n = 71)
Acrochordon
Boxer 15 21.13 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 19.72 1.54
Labrador retriever 10 14.08 3.17
Hair follicle tumor
(n = 69)
Mixed 29 42.03 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 10.14 7.78
bassett hound 5 7.25 38.46
Trichoepithelioma
(n = 28)
Mixed 16 57.14 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 7.14 15.38
boxer/golden retriever# 2 7.14 1.47/3.85
Trichoblastoma
(n = 20)
Mixed 4 20.00 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 15.00 3,33 1: 3.00
cocker spaniel 2 10.00 4,26  
Histioproliferative disorders
(n = 61)
Mixed 20 32.79 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 16.39 7.35
French bulldog 7 11.48 17.07
Histiocytoma
(n = 58)
Mixed 20 34.48 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 15.52 6.62
French bulldog 7 12.07 17.07
Hamartomas (n = 56) Mixed 18 32.14 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 23.21 4.13
Boxer 12 21.43 8.82
Epidermal tumor
(n = 60)
Mixed 14 23.33 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 20.00 3.81
Dogo Argentino 6 10.00 85.71
Squamous cell carcinoma
(n = 32)
Mixed 8 25.00 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 15.63 71.43
Labrador retriever 4 12.50 1.27
  1. *This breed only had one exemplar in our database which result in 100% of breed specific occurrence
  2. #both breeds present the same number of cases and frequencies, although the occurrence within breed is different