Primary erythrocytosis of childhood.
D001772:Blood Cell Count; D001856:Bone Marrow Examination; D002648:Child; D006400:Hematocrit; D006452:Hemoglobinometry; D006801:Humans; D007621:Karyotyping; D007964:Leukocytosis / Q000150:complications; D008297:Male; D011086:Polycythemia / Q000097:blood / Q000235:genetics*; D011123:Polyploidy; D013163:Splenomegaly / Q000150:complications; D013922:Thrombocytosis