FeLV-negative lymphosarcoma

FeLV-negative lymphosarcoma may be nothing to do with FeLV; for example,. may be primary neoplastic events or possibly due to FIV infection in older cats. However, FeLV-negative cases of lymphosarcoma are more common in cats from colonies with enzootic FeLV infection, so it may be that in these cases the cat's immune response eliminated the virus, but only after transformation of some cells had already occurred.

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