A phase III prospective randomized multicenter study was performed to determine whether quinine could improve the response rate of poor-risk acute leukemias (ALs) to standard chemotherapy including a multidrug resistance (MDR)-related cytotoxic agent. The rationale of the study was based on the negative prognostic value of MDR phenotype in ALs and the ability of quinine to reverse this phenotyp...

The purpose of this study was to define, in a phase I study in leukemia, the maximally tolerated dose (MTD), major toxicities, and possible antitumor activity of Topotecan, a new topoisomerase I (topo I) inhibitor. Topotecan was delivered by a 5-day continuous infusion every 3 to 4 weeks to patients with refractory or relapsed acute leukemia, at doses ranging from 3.5 mg/m2 to 18 mg/m2 per cour...

Background and Objective: Since there are very few studies on the immunodeficiency state of the Iranian survivors of pediatric acute lymphoblastic leukemia (ALL), we conducted this study to determine the prevalence of humoral defects in children with ALL at least one year after completion of chemotherapy. Methods: In this study, antibody titers for mumps, rubeola, rubella, tetanus and diphth...

Bone tumors are fortunately rare, but small cell tumors of bone are a relatively common subset of these lesions. They comprise of a diverse group of primary and metastatic neoplasms in both children and adults. The most common small cell tumors of bone include Ewing sarcoma/primitive neuroectodermal tumor, small cell osteosarcoma, multiple myeloma, lymphoma, leukemia, neuroblastoma, rhabdomyosa...

Blastic plasmocytoid dendritic cell neoplasm is characterized by aggressive behavior with a tendency for systemic dissemination and a predilection for skin, lymph nodes, soft tissues, peripheral blood, or bone marrow. It usually occurs in elderly patients with a mean age between 60 and 70 years. Despite initial response to chemotherapy, the disease regularly relapses with a short median overall...

The effect of hydroxyurea in 35 patients with chronic granulocytic leukemia (CGL), who either had entered an accelerated phase of the disease or had experienced excessive myelosuppression following alkylating agents, was studied. By either intravenous or oral administration, the drug was successful in reducing peripheral leukocyte and blast counts in all cases and in reducing splenomegaly in 13...

Agranular CD4/CD56 hematodermic neoplasm (CD4/CD56 HN), also termed blastic natural killer cell lymphoma, is characterized by a peculiar immunophenotype and high skin tropism. The lineage of origin is not known, and a plasmacytoid dendritic cell derivation has been proposed. CD4/CD56 HN generally is diagnosed by using tumor skin biopsy, with the most important differential diagnosis being myelo...

1. Argatoff LH, Connors JM, Klasa RJ, Horsman DE, Gascoyne RD. Mantle cell lymphoma: a clinicopathologic study of 80 cases. Blood 1997; 89:2067-78. 2. Ott G, Kalla J, Ott MM, et al. Blastoid variants of mantle cell lymphoma: frequent bcl-1 rearrangements at the major translocation cluster region and tetraploid chromosome clones. Blood 1997; 89:1421-9. 3. Norton AJ, Matthews J, Pappa V, et al. M...

which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Acute myeloid leukemia arising from chronic myelomonocytic leukemia during hypomethylating therapy TO THE EDITOR: Acute myeloid leukemia (AML) arising from chronic myelomonocytic leukemia (CMML) exhibits a poor prognosis [1, 2] and represents a great challen...

background and objective: since there are very few studies on the immunodeficiency state of the iranian survivors of pediatric acute lymphoblastic leukemia (all), we conducted this study to determine the prevalence of humoral defects in children with all at least one year after completion of chemotherapy. methods: in this study, antibody titers for mumps, rubeola, rubella, tetanus and diphtheri...