Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Skin lesions in South African domestic animals with special reference to the incidence and prognosis of various skin tumours.

Abstract

Of 103 skin tumours diagnosed histologically from biopsy specimens at Onderstepoort over 22 months, 16 were mastocytomas (15 in dogs, 1 in a cat); 13 papillomas (sarcoid) (10 in horses, 1 each in ox, pig, dog); 12 acanthomas (8 in sheep, 2 in pigs, 1 ox, 1 cat); 9 basal-cell carcinomas (7 dogs, 1 horse, 1 cat); 7 melanomas (3 horses, 2 goats, 1 ox, 1 dog); 7 squamous-cell carcinomas (4 dogs, 2 sheep, 1 ox); 5 epidermoid cysts (3 dogs, 1 horse, 1 monkey); 4 sebaceous adenocarcinomas (3 dogs, 1 ox); 3 calcinosis circumscripta, 3 perianal-gland and 3 sebaceous-gland adenomas (all in dogs); 3 haemangiomas (2 dogs, 1 ox); 3 haemangiosarco-mas (2 dogs, 1 horse); 2 haemangiopericytomas, 2 lipomas, 2 tumours (of the hair matrix), 1 acan-thosis nigricans, 1 contagious venereal tumour, 1 lymphoma and 1 fibroma (all in dogs); 1 fibre sarcoma (sheep); 1 neurofibrosarcoma (dog); 1 liposarcoma (horse); and 1 undifferentiated carcinoma (in a cat). No special efforts were made to collect such specimens. Tumours of the eyelid were 11 acanthomas (6 in cattle, 4 in horses, 1 in a sheep); 2 squamous-cell carcinomas (sheep, ox); 1 adenoma of tarsal gland (ox); 1 basal-cell carcinoma and 1 haemangiosarcoma (in dogs). The importance of biopsy for correct diagnosis is emphasized.-F.E.W.