large creamy color livers of some chickens from a commercial broiler flock, reared in tehran province, were noticed in a slaughter house. myeloid leukosis (myelocytoma) characterized by presence of typical gross and microscopic lesions was diagnosed. further studies for assessment of prevalence of this disease in broiler breeders and broilers flocks was suggested.

Large creamy color livers of some chickens from a commercial broiler flock, reared in Tehran province, were noticed in a slaughter house. Myeloid leukosis (myelocytoma) characterized by presence of typical gross and microscopic lesions was diagnosed. Further studies for assessment of prevalence of this disease in broiler breeders and broilers flocks was suggested.

The subgroup J of avian leukosis virus causes myelocytomas, a neoplastic condition the birds that affects several visceral organs. In present study, myelocytomas were diagnosed in adult laying based on cytological and histopathological examination. On necropsy examination, showed enlarged liver spleen with multifocal tumorous growths liver, spleen, kidneys, lungs, ovary, proventriculus, intesti...

B SIMoN PROPP, M.D., L. WHITTINGTON GORHAM, M.D., AND SAMUEL KANTOR, M.D. M ULTIPLE MYELOMA is commonly known as a malignant disease characterized by bone pain, deformity and abnormal fragility of the osseous system, cacheXia, and Bence-Jones proteinuria. The tumors tend to be multiple. They are found most frequently in the spine, ribs, skull, bones of the shoulder girdle, pelvis, sternum and u...

B SIMoN PROPP, M.D., L. WHITTINGTON GORHAM, M.D., AND SAMUEL KANTOR, M.D. M ULTIPLE MYELOMA is commonly known as a malignant disease characterized by bone pain, deformity and abnormal fragility of the osseous system, cacheXia, and Bence-Jones proteinuria. The tumors tend to be multiple. They are found most frequently in the spine, ribs, skull, bones of the shoulder girdle, pelvis, sternum and u...

S OF INVITED CONTRIBUTIONS GENETIC CONTROL OF CELL SURFACE COMPONENTS. W. F. BODMER, Genetics Laboratory, Department of Biochemistry, University of Oxford. Title Only VIRUS-ASSOCIATED CELL SURFACE PRODUCTS: RELEVANCE TO MALIGNANT TRANSFORMATION. J. WYKE, ICRF, London. Infection by viruses of several different families is associated with neoplasia, and many instances are known in which products ...