title: Letter: Primary thrombocythemia in a child.
mesh_terms: D001706:Biopsy; D001772:Blood Cell Count; D001791:Blood Platelet Disorders / Q000150:complications / Q000175:diagnosis* / Q000209:etiology; D001792:Blood Platelets; D001856:Bone Marrow Examination; D002470:Cell Survival; D002648:Child; D002860:Chromium Radioisotopes; D003937:Diagnosis, Differential; D004906:Erythrocyte Count; D005260:Female; D006801:Humans; D006971:Hypersplenism / Q000150:complications; D007938:Leukemia / Q000175:diagnosis; D007958:Leukocyte Count; D008533:Megakaryocytes; D013163:Splenomegaly / Q000209:etiology
chemical_list: D002860:Chromium Radioisotopes