Abstract
Two cases of Ph1-positive chronic granulocytic leukemia with hitherto undescribed translocations are presented. In case 1, the deleted part of chromosome number 22q- was translocated to the short arm of the X chromosome, t(X;22)(p22;q11). Pronounced basophilia, trisomy 19 in the majority of metaphases and a partial cytogenetic normalization of the bone marrow during busulfan induced remission were additional remarkable features of this case. In case 2, a translocation t(15;22)(q26;q11) was found. In this case the disease was characterized by an increase of unusually small megakaryocytes, thrombocytosis, and an accelerated course.