Neoplastic and Nonneoplastic Cutaneous Tumors of Dogs in Grenada, West Indies

Table 1

Histological types, frequency, mean age (in years), and sex ratio for neoplastic and nonneoplastic tumors in the skin of dogs from Grenada, West Indies.

Tumor type	Frequency	Mean age (yrs)	M : F
Hematopoietic tumors ( 𝑛=4)
Indolent plasmacytoma	3	7.3	2 : 1
Lymphoma	1	6.0	0 : 1
Epithelial and melanocytic tumors ( 𝑛=80)
(i) Tumors of the epidermis
Papilloma	9	6.1	5 : 4
Squamous cell carcinoma	7	6.3	5 : 2
(ii) Tumors with adnexal differentiation
Infundibular keratinizing acanthoma	1	10.0	1 : 0
Trichoepithelioma	3	7.6	1 : 2
Trichoblastoma	4	6.0	3 : 1
(iii) Sebaceous and modified sebaceous gland tumors
Hepatoid gland adenoma	2	10.5	1 : 1
Hepatoid gland carcinoma	1	12.0	1 : 0
Sebaceous epithelioma	1	13.0	1 : 0
Sebaceous adenoma	1	10.0	0 : 1
(iv) Apocrine and modified apocrine tumors
Apocrine adenoma	1	13.0	1 : 0
Apocrine adenocarcinoma	2	N. R	1 : 1
(v) Nail bed tumors
Subungual keratoacanthoma	1	2.5	1 : 0
(vi) Melanocytic tumors
Melanocytoma	13	6.9	9 : 4
Malignant melanoma	5	8.9	3 : 2
(vii) Cysts
Infundibular cyst	4	5.6	2 : 2
Dermoid cyst	1	N. R*	1 : 0
Isthmus cyst	2	8.5	1 : 1
(viii) Hamartomas
Sebaceous hamartoma	1	13	1 : 0
Fibroadnexal hamartoma	3	10	2 : 1
(ix) Tumor-like lesions
Sebaceous hyperplasia	9	9.8	5 : 4
Fibroepithelial polyp	8	7.4	2 : 6
Fibropruritic nodule	1	4	1 : 0
Mesenchymal tumors ( 𝑛=99)
(i) Tumors of vascular tissue
Hemangioma	8	8.9	6 : 2
Scrotal vascular hamartoma	2	6.0	2 : 0
Hemangiosarcoma	31	8.3	19 : 12
(ii) Histiocytic tumors
Histiocytoma	14	4.7	7 : 7
Malignant histiocytosis	4	8.0	2 : 2
(iii) Mast cell tumors	11	7.3	8 : 3
(iv) Tumors of fibrous tissue
Fibroma	3	7.2	1 : 2
Collagenous hamartoma	4	7.6	2 : 2
Fibrosarcoma	9	6.7	3 : 6
(v) Tumors of adipose tissue
Lipoma	11	8.7	4 : 7
Liposarcoma	2	8.5	1 : 1
Unclassified tumors ( 𝑛=14)
Hemangiopericytoma	10	7.7	5 : 5
Transmissible venereal tumor	4	5.5	3 : 1

*N. R: Age not reported; M: Male; F: Female.