Virally Induced Hyperplasia or Hypertrophy

Several viral diseases are characterized by cutaneous growths. Some of these lesions are neoplasms, but others such as 'carp pox' are epidermal hyperplasia of well-differentiated cells with little or no involvement of the dermis (Sano et al., 1991). Other virally induced masses, most notably lymphocystis disease, are characterized by hypertrophied cells and are easily distinguished from neoplasia. Non-neoplastic diseases that have been associated with viruses are discussed further in the virology section of this chapter.

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