CHROMOSOMES AND CAUSATION OF HUMAN CANCER AND LEUKEMIA .21. CYTOGENETICALLY UNUSUAL CASES OF LEUKEMIA

Abstract

Three male patients with leukemia were found with banding techniques to have unusual cytogenetic pictures in the cells of their marrow, spleen or blood. Case No. 1 (78 yr old) was that of a Ph1-negative CML with a missing Y in the blood (cultured without PHA [phytohemagglutinin]) and marrow cells. The patient is still alive and responding to therapy. Case No. 2 (54 yr old) was considered prior to admission to have either CML [chronic myelocytic leukemia] or AML [acute myelocytic leukemia], but was shown, in fact, to be in the blastic phase of CML; all the cells in his marrow and spleen were Ph1-positive, but with no evidence of a translocation. Other karyotypic findings (+8, +11, +13, +21) frequently encountered in the blastic phase of CML were present in the cells of this patient. Case No. 3 (50 yr old) with AML had a Ph1 resulting from a standard translocation, i.e., [t(9;22) (q34;q11)], in a substantial number of the cells in the marrow and blood (cultured without PHA). The implications of these unusual findings were discussed in relation to the chromosomal pictures usually encountered in these states.