Abdominal NeoplasmsSplenomegalySplenectomyHepatomegalyPrimary MyelofibrosisSplenic NeoplasmsSpleenPancreatic NeoplasmsNeoplasmsMyeloproliferative DisordersHypersplenismNeoplasms, Cystic, Mucinous, and SerousLymphatic DiseasesSplenic DiseasesSkin NeoplasmsMurine Acquired Immunodeficiency SyndromeNeoplasms, Multiple PrimaryJanus Kinase 2Kidney NeoplasmsBone MarrowThrombocytopeniaNeoplasms, Second PrimaryPolycythemia VeraHistiocytic SarcomaLymphomaLeukemia, ExperimentalTropical MedicineAdenocarcinoma, MucinousThyroid NeoplasmsSkin Diseases, EczematousLiver NeoplasmsLeukemia, ProlymphocyticHypertension, PortalAnemiaHematopoiesis, ExtramedullaryImmunohistochemistryLeukemia, Hairy CellBone Marrow NeoplasmsLymphoproliferative DisordersLeukocytosisFatal OutcomeFriend murine leukemia virusDNA, NeoplasmLung NeoplasmsParotid NeoplasmsCystadenomaSplenic VeinThrombocytosisNeoplasms, Connective and Soft TissueDog DiseasesNeoplasms, Plasma CellAutoimmune Lymphoproliferative SyndromeAppendiceal NeoplasmsRetrospective StudiesLymphocytosisThrombocythemia, EssentialMice, Inbred C57BLCystadenoma, Mucinous