Terminal deoxynucleotidyl transferase, an enzyme which catalyzes the polymerization of deoxyribonucleoside triphosphates, elongating oligo- or polydeoxynucleotide chains, but without direction from a nucleic acid template, is thought to be specific for thymus gland and thymus-derived cells. We have confirmed the observations that high levels are characteristic of thymus gland with both human an...

Terminal deoxynucleotidyl transferase, an enzyme which catalyzes the polymerization of deoxyribonucleoside triphosphates, elongating oligoor polydeoxynucleotide chains, but without direction from a nucleic acid template, is thought to be specific for thymus gland and thymusderived cells. We have confirmed the observations that high levels are characteristic of thymus gland with both human and c...

Granulocytic sarcoma (GS) is an extramedullary tumor composed of immature myeloid cells, typically occurring during the course of acute myelogenous leukemia. Non-leukemic GS, that is, GS with no evidence of overt leukemia and no previous history of leukemia, is very rare, and even more unusual is nonleukemic GS of the bile duct. We report a case of nonleukemic GS of the bile duct. The patient w...

Background:Leukemia is cancer of blood and bone marrow cells. In general, there are four types of leukemia: chronic myelogenous leukemia (CML), acute myeloid leukemia (AML), B-cell chronic lymphocytic leukemia (CLL) and acute lymphoblastic leukemia (ALL).  Fractal geometry can be introduced as one of the effective ways to detect this type of cancer. In this study, with introduc...

Leukemia is a clonal proliferation of hematopoietic stem cells in the bone marrow. The four broad subtypes most likely to be encountered by primary care physicians are acute lymphoblastic, acute myelogenous, chronic lymphocytic, and chronic myelogenous. Acute lymphoblastic leukemia occurs more often in children, whereas the other subtypes are more common in adults. Risk factors include a geneti...

Blast cells were obtained from 17 patients with acute undifferentiated leukemia and 13 patients with chronic myelogenous leukemia in blast crisis. The blasts were tested with anti-i serum in cytotoxicity tests and with antisera to myeloblastic leukemia-associated antigens in immunofluorescence tests. The terminal deoxynucleotidyl transferase (TDT) content of the blasts was also measured. Lympho...