Myeloblastosis-associated virus (MAV)-2(0), a virus which was derived from avian myeloblastosis virus and induced a high incidence of osteopetrosis, was compared with avian lymphomatosis virus 5938, a recent field isolate which induced a high incidence of lymphomatosis. The following information was obtained. (i) MAV-2(0) induced osteopetrosis, nephroblastoma, and a very low incidence of hepato...

Neurolymphomatosis is an extremely rare neurologic manifestation of systemic lymphoma in which B-cell nonHodgkin’s lymphoma a much more common cause. Neurolymphomatosis must be differentiated from more frequent neurologic manifestations of lymphoma, including peripheral nerves compression by enlarged lymph nodes, radiation plexopathy, herpes zoster infection, and lymphoma-associated vasculitis....

A case of syringomyelia involving the entire spinal cord secondary to a spinal intramedullary tumour is described. Cerebrospinal fluid cytology and microscopic evaluation of gross necropsy specimens revealed a primary large cell lymphoma of the central nervous system. In addition there was massive leptomenigeal lymphomatosis involving the cortex, brainstem, and cerebellum. No solitary intracran...