1.Definition It is directly caused by chronic alterations in pulmonary circulation or chronic chest diseases that lead to pulmonary arterial hypertension, right ventricular enlargement, even right heart failure
What is RA? RA is a chronic polyarticular inflammatory arthritis that involves not only small joints of the hands and feet but also systemic organs. Pathologic change: chronic synovitis with pannus (血管 翳)formation
Concept of leukemia Definition It is the results of the tumor proliferation of heamotopoietic stem cells.(造血干细胞) Leukemia is a malignant blood disorder. (not solid tumor)