myelofibrosis
noun medical specialized uk/ˌmaɪ.ə.ləʊ.faɪˈbrəʊ.sɪs/ us/ˌmaɪ.ə.loʊ.faɪˈbroʊ.sɪs/ (also agnogenic myeloid metaplasia)
骨髓纤维化，骨髓纤维变性
a condition in which scar tissue grows in the bone marrow so that not enough blood cells are produced for the body