原发性血小板增多症(essential thrombocy themia,ET)系主要累及巨核细胞系的慢性骨髓增殖性肿瘤,其特征为外周血中血小板持续增多,骨髓中巨核细胞过度增殖,多见于40岁以上的成年人,儿童少见。最近我科诊治1例儿童ET,现结合国内外文献资料报告如下。1病例资料患者,男,8岁,因“右侧面颊部肿痛1d”入院 Essential thrombocythemia (essential thrombocythemia) (ET) is a series of chronic myeloproliferative neoplasms that mainly involve the megakaryocyte cell line. It is characterized by an increase in platelet count in peripheral blood and hyperproliferation of megakaryocytes in the bone marrow, which is more common in adults over 40 years of age People, children rare. Recently, 1 case of pediatric diagnosis and treatment of ET, now combined with domestic and international literature and reports are as follows. 1 case data patient, male, 8 years old, due to “right cheek Ministry swelling pain 1d ” admission