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epidermal papillomas with virus-like particles in flathead sole, hippoglossoides elassodon.

epidermal papillomas frequently occur on the external surfaces of flathead sole, hippoglossoides elassodon, in the waters of san juan islands, washington. virus-like particles and associated granular bodies, also of possible viral nature, are commnonly found in the neoplastic epithelial cells of these tumors. similar structures are not observed in normal epidermis.