Submitted to: Merck Veterinary Manual
Publication Type: Book / Chapter
Publication Acceptance Date: September 3, 2002
Publication Date: February 28, 2005
Citation: Fadly, A.M. 2005. Neoplasms-poultry. In: Kahn, C., editor. Whitehouse Station, New Jersey: Merck & Company, Inc. Merck Veterinary Manual. p. 2248-2255. Technical Abstract: Depending on whether the etiologic agent is known, neoplasms of poultry are divided into two main categories: a) virus-induced neoplasms, and 2) neoplasms of unknown etiology. There are three economically important virus-induced neoplastic diseases of poultry, namely Marek's disease, caused by a herpesvirus, and the avian leukosis/sarcoma and reticuloendotheliosis, caused by retroviruses. A neoplastic disease of turkeys known as lymphoproliferative disease that had been reported in Europe and Israel is induced by yet another retrovirus distinct from both the leukosis/sarcoma and reticuloendotheliosis viruses. The incidence of lymphoproliferative disease of turkeys has always been sporadic; therefore discussion of this rare neoplastic syndrome of turkeys is not included in this chapter. Neoplasms of unknown etiology are classified according to their morphologic characteristics; they include a wide variety of benign and malignant neoplasms. Of these tumors only dermal squamous cell carcinoma, multicentric histiocytosis and adenocarcinoma are noted in this chapter.