title: Polycythemia vera in nonagenarian.
mesh_terms: D000367:Age Factors; D000368:Aged; D005260:Female; D006400:Hematocrit; D006529:Hepatomegaly / Q000175:diagnosis; D006801:Humans; D007964:Leukocytosis / Q000175:diagnosis; D011087:Polycythemia Vera / Q000097:blood / Q000175:diagnosis*; D013163:Splenomegaly / Q000175:diagnosis; D013922:Thrombocytosis / Q000175:diagnosis; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D014805:Vitamin B 12