Wolke R E, Murchelano R A
J Wildl Dis. 1976 Apr;12(2):167-71. doi: 10.7589/0090-3558-12.2.167.
A white, raised mass present on the caudal fin of a smooth dogfish shark (Mustelus canis) was identified as an epidermal papilloma with areas suggestive of carcinoma in situ. When examined by electron microscopy no structures or particles of viral origin were apparent.
在一条平滑狗鲨（犬星鲨）的尾鳍上发现了一个白色的隆起肿物，经鉴定为表皮乳头状瘤，局部有原位癌的迹象。通过电子显微镜检查，未发现明显的病毒来源结构或颗粒。
