Efficacy of orchiectomy on canine perianal gland tumors
1994
Tomizawa, N. (Iwate Univ., Morioka (Japan). Faculty of Agriculture) | Okada, K. | Goryo, M. | Okada, K. | Hara, S.
Efficacy of orchiectomy on perianal gland tumors in 5 dogs was investigated. Affected dogs consisted of between 12 and 14 years of age and 3 mongrels, 1 Shetland sheepdog and 1 Pekingese. Their tumor size ranges from 2-30 mm in diameter. Four dogs out of 5 had multicentric lesions. All tumors accompanied with ulceration. No metastases in any dogs to regional lymph nodes or lungs were observed. After orchiectomy, complete disappearance of tumors was observed in 2 dogs, and softening and/or decrease in size of tumors was observed in 2 dogs. In another dog, the tumor did not respond to orchiectomy. Histopathologically, the tumors of two dogs were diagnosed as hepatoid cell adenoma. Since lydig cell tumor and seminoma was observed in the testes in 2 dogs, it was suggested that perianal gland tumors were concerned with male hormones. Though following observation was necessary to determine prognosis of the condition, it was considered that orchiectomy might be initial treatment for perianal gland tumors because relief of clinical signs and disappearance/reduction of tumors was observed by this treatment
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