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PubMed2003

Dendritic cell-based immunotherapy for the treatment of hematological malignancies.

Dendritic cells (DCs) are professional antigen-presenting cells and are frequently used in current immunotherapy protocols. The administration of DCs loaded with tumor-associated proteins or peptides results in the induction of immune responses against different types of malignant cells. Methods for large-scale generation of DCs in a sufficient quality and quantity have permitted their use in clinical experiments. DC-based vaccines have already shown promise in follicular non-Hodgkin's lymphoma, and to some extent, in other hematological malignancies. Several strategies have been developed to boost their potency as a new and relatively non-toxic treatment modality. Our review focuses on clinical trials using DCs in the treatment of hematologic malignancies and on recent studies of the immunophenotype, development, and maturation of DCs may have an important impact on designing DC-based antitumor vaccines.

Animals↗

PubMed1988

Fractionated total body irradiation and high dose cyclophosphamide: a preparative regimen for bone marrow transplantation for patients with hematologic malignancies in first complete remission.

We treated 73 patients with hematologic malignancies in first complete remission (acute lymphoblastic leukemia = 23 patients; acute non-lymphoblastic leukemia = 25 patients; chronic myelogenous leukemia in first chronic phase = 20 patients, and high grade lymphoma = five patients) with a uniform preparative regimen consisting of fractionated total body irradiation (1,320 cGy) and high dose cyclophosphamide (100 mg/kg), followed by allogeneic bone marrow transplantation. By radiation dosimetry we demonstrated that the calculated doses were delivered accurately and reproducibly. Actuarial survival rates (+/- SEM) in complete remission were as follows: Acute lymphoblastic leukemia = 74 +/- 9%; acute nonlymphoblastic leukemia = 50 +/- 11%; and chronic myelogenous leukemia = 55 +/- 11%. Actuarial relapse rates for these three diagnoses were 19 +/- 9%, 17 +/- 11%, and 0% respectively. Three of the five lymphoma patients are alive in complete remission at 22+, 28+, and 54+ months. Overall probability of survival for the 73 patients was 59 +/- 7%. Interstitial pneumonia, usually associated with cytomegalovirus infection and graft-versus-host disease, and relapse of the underlying malignancy were the major causes of death.

Adolescent↗

PubMed2002

Systemic availability of arsenic from oral arsenic-trioxide used to treat patients with hematological malignancies.

AIMS: Arsenic trioxide (As2O3) is increasingly used to treat hematological malignancies. This involves daily intravenous (i.v.) administration for 4-8 weeks, with its attendant drawbacks: inconvenience, risks and expense of maintaining suitable vascular access and hospitalization. We therefore developed an oral formulation, administered it to patients and set out to assess the resulting systemic bioavailability of arsenic. METHODS: With ethics committee approval, nine patients with refractory/relapsed acute myeloid leukemia were recruited after giving informed consent. On day 1, each received 10 mg As2O3 by i.v. infusion over 1 h. Each patient swallowed 10 mg As2O3 in 10 ml oral solution 24 h later (day 2) and on subsequent days thereafter. Prior to and until 48 h post-i.v. dosing, timed venous blood samples were drawn and corresponding plasma and whole blood arsenic concentrations were determined by atomic absorption spectroscopy. Systemic bioavailability was inferred from the area under the arsenic level versus time curve (AUC) using the trapezoidal rule. Day-1 AUC after i.v. dosing was taken to be 100% and that attributed to oral dosing (day 2) was then calculated. The 48-h arsenic levels in blood cells were calculated using hematocrit values and corresponding plasma and whole blood arsenic concentrations. RESULTS: Respective day-2 mean plasma and blood AUCs attributed to oral dosing were 99% and 87% of corresponding day-1 values. On average, 48-h blood cell arsenic levels were 270% greater than in plasma ( P=0.013). No patient suffered unexpected complications, and five went into remission. CONCLUSIONS: Compared with i.v. dosing, our oral As2O3 formulation was more convenient and cost effective, and the ensuing systemic bioavailability of arsenic appeared similar. Arsenic seemed to be concentrated in the cellular fraction of blood 48 h after starting As2O3 treatment.

Acute Disease↗

PubMed1990

Fusarium infections in patients with hematologic malignancies.

Two cases of Fusarium infection in patients with refractory hematologic malignancies are reported. In one patient septicemia progressed to death in septic shock. Miconazole showed some effect in clearing the lesions. There is some evidence that mycotoxins are related with Fusarium infections since severe myositis occurred in our patient. The other patient had a T-cell lymphoma, undergoing allogeneic bone marrow transplantation. The course was also complicated by Fusarium infection of the skin. This patient died of multiorgan failure. Recent literature on Fusarium is reviewed.

Adult↗

PubMed1985

Mismatched bone marrow transplantation in children with hematologic malignancy using T lymphocyte depleted bone marrow.

Twenty children with hematologic malignancies were treated with bone marrow transplantation using histoincompatible donor marrow depleted of T lymphocytes. CT-2 and complement were used to deplete the T lymphocytes. Engraftment was not a major problem in those receiving increased pre- and posttransplant immunosuppression. Five of the 20 children are currently alive and disease-free. Complications in the other children included engraftment problems, cyclosporin toxicity, infections, and bleeding. However, for most children, durable engraftment was seen. Thus, the nonavailability of histocompatible donors is no longer a contraindication to allogeneic bone marrow transplantation for those at high risk of relapse.

Adolescent↗

PubMed1996

Toxicity of busulfan and cyclophosphamide (BU/CY2) in patients with hematologic malignancies.

Between July 1991 and January 1994, 52 patients with hematologic malignancies underwent BMT using BU/CY2 as conditioning regimen. Median patient age was 38 years. Eleven patients underwent autologous BMT, 22 HLA-identical allogeneic BMT, and 19 patients underwent a MUD or an allogeneic mismatched BMT. GVHD prophylaxis was with cyclosporine/methylprednisone in 26 patients; T cell depletion was used in 15 patients. VOD was observed in 7.5% of patients, IP in 12%, seizures in 4%. The overall incidence of grade II-IV acute GVHD was 35%. Delayed platelet engraftment was observed in seven of 11 patients who underwent autologous BMT. Graft failure was seen in seven of 19 (37%) patients who underwent MUD or allogeneic mismatched BMT. Six of the seven patients received T cell depletion as GVHD prophylaxis. BU/CY2 transplantation from an unrelated or family-mismatched donor with T cell depletion is associated with a high incidence of graft failure.

Adolescent↗

PubMed1999

Isochromosome 17q in blast crisis of chronic myeloid leukemia and in other hematologic malignancies is the result of clustered breakpoints in 17p11 and is not associated with coding TP53 mutations.

An isochromosome of the long arm of chromosome 17, i(17q), is the most frequent genetic abnormality observed during the disease progression of Philadelphia chromosome-positive chronic myeloid leukemia (CML), and has been described as the sole anomaly in various other hematologic malignancies. The i(17q) hence plays a presumably important pathogenetic role both in leukemia development and progression. This notwithstanding, the molecular consequences of this abnormality have not been investigated in detail. We have analyzed 21 hematologic malignancies (8 CML in blast crisis, 8 myelodysplastic syndromes [MDS], 2 acute myeloid leukemias, 2 chronic lymphocytic leukemias, and 1 acute lymphoblastic leukemia) with i(17q) by fluorescence in situ hybridization (FISH). Using a yeast artificial chromosome (YAC) contig, derived from the short arm of chromosome 17, all cases were shown to have a breakpoint in 17p. In 12 cases, the breaks occurred within the Smith-Magenis Syndrome (SMS) common deletion region in 17p11, a gene-rich region which is genetically unstable. In 10 of these 12 cases, we were able to further map the breakpoints to specific markers localized within a single YAC clone. Six other cases showed breakpoints located proximally to the SMS common deletion region, but still within 17p11, and yet another case had a breakpoint distal to this region. Furthermore, using chromosome 17 centromere-specific probes, it could be shown that the majority of the i(17q) chromosomes (11 of 15 investigated cases) were dicentric, ie, they contained two centromeres, strongly suggesting that i(17q) is formed through an intrachromosomal recombination event, and also implicating that the i(17q), in a formal sense, should be designated idic(17)(p11). Because i(17q) formation results in loss of 17p material, potentially uncovering the effect of a tumor suppressor on the remaining 17p, the occurrence of TP53 mutations was studied in 17 cases by sequencing the entire coding region. In 16 cases, no TP53 mutations were found, whereas one MDS displayed a homozygous deletion of TP53. Thus, our data suggest that there is no association between i(17q) and coding TP53 mutations, and that another tumor suppressor gene(s), located in proximity of the SMS common deletion region, or in a more distal location, is of pathogenetic importance in i(17q)-associated leukemia.

Adolescent↗

PubMed2003

Methotrexate vs Cyclosporin A as a single agent for graft-versus-host disease prophylaxis in pediatric patients with hematological malignancies undergoing allogeneic bone marrow transplantation from HLA-identical siblings: a single-center analysis in Japan.

The efficacy of methotrexate (MTX) as a single graft-versus-host disease (GVHD) prophylaxis agent was compared to that of cyclosporin A (CSA) in 62 pediatric patients (median age: 8 years) with hematological malignancies who had undergone bone marrow transplantation (BMT) from HLA-identical sibling donors at National Kyushu Cancer Center since 1977. In all, 30 patients received MTX by intravenous bolus injection, with a dose of 15 mg/m(2) on day +1, followed by 10 mg/m(2) on days +3, +6, and +11, and then once a week until day +100. A total of 32 patients were treated with CSA, which was given intravenously in the early stages and orally thereafter until day +100, and then gradually tapered and stopped 6 months after BMT. There were no differences between the groups in terms of rates of hematopoietic recovery after BMT. The probabilities of acute GVHD (grades II-IV) and chronic GVHD were 29.6 vs 40.6% (P=0.294) and 19 vs 20% (MTX vs CSA), respectively. Relapse rates and event-free survival were identical. These results suggest that MTX and CSA were equally effective when given after BMT in Japanese pediatric patients with hematological malignancies. Since MTX was given over a shorter time than CSA, it might be more practical in the management of such patients.

Adolescent↗

PubMed2005

Pharmacogenetics of cyclophosphamide in patients with hematological malignancies.

PURPOSE: A high degree of interindividual variation in cyclophosphamide (CPA) pharmacokinetics was reported in certain cancer patient groups. To better understand the mechanisms underlying the variation in CPA metabolism, we have investigated the pharmacokinetics of CPA and its active metabolite 4-hydroxycyclophosphamide (4-OH-CPA) in patients with hematological tumors. The pharmacokinetics of CPA and its active metabolite were related to the genotype of CYP2B6, CYP2C9 and CYP2C19. The influence of liver function on CPA metabolism was also evaluated. METHODS: Twenty-nine patients with hematological malignancies (MM, ALL or NHL) treated with a conventional CPA dose (1g/m(2)) were recruited to this study. Blood samples were collected before, during and after CPA treatment. HPLC was used to measure plasma concentrations of CPA and 4-OH-CPA. Patients were genotyped for the CYP2B6 G516T, CYP2C9*2, CYP2C9*3, CYP2C19*2 and CYP2C19*3 alleles. Serum bilirubin levels were measured before the treatment. Data was analyzed individually and by population pharmacokinetic methods, using non-linear mixed effect modeling. RESULTS: The interindividual variability in exposure to CPA, 4-OHCPA and 4-OH-CPA/CPA was 5.8-, 3.3- and 10.3-fold, respectively. A positive correlation between half-lives of CPA and 4-OH-CPA was found while a significant negative correlation between AUCs of CPA and 4-OH-CPA was detected. In the population analysis, the CYP2B6 G516T variant allele contribution to CPA clearance was about twice as the contribution from the wild type gene while the genotype of CYP2C9 and CYP2C19 did not influence clearance. A negative correlation was observed between bilirubin level and CPA bioactivation. CONCLUSION: This study demonstrates for the first time that the presence of the CYP2B6 G516T mutation increases the rate of 4-OH-CPA formation in patients with hematological malignancies. The liver function prior therapy as assessed by s-bilirubin influences CPA metabolism.

Adolescent↗

PubMed2002

A homozygous germ-line mutation in the human MSH2 gene predisposes to hematological malignancy and multiple café-au-lait spots.

Individuals with a germ-line mutation in one of the DNA mismatch repair (MMR) genes are at significant risk for colorectal cancer and other tumors. Three families have previously been reported with individuals homozygous for mutations in the MMR gene MLH1 that are predicted to compromise MMR. These individuals develop hematological malignancies and/or neurofibromatosis type 1 at an early age. Here, in an individual, we demonstrate that a homozygous novel mutation in the MMR gene MSH2 is associated with leukemia and multiple café-au-lait spots, a feature of neurofibromatosis type 1. Because the hematological malignancies observed in the individuals homozygous for the loss of MMR are reflective of the lymphomas seen in mice lacking MMR, the mice may provide a useful model for human neoplasia.

Adaptor Proteins, Signal Transducing↗

PubMed2026

Longitudinal Neurocognitive Changes for Patients With Hematologic Malignancies Undergoing Hematopoietic Stem Cell Transplantation: A Systematic Review With Structured Narrative Synthesis.

OBJECTIVES: Neurocognitive changes in hematological malignancies (HM) and as a sequela of hematopoietic stem cell transplantation (HSCT) remain under-recognized. These changes may substantially affect patients' quality of life. Therefore, this review systematically evaluated longitudinal neurocognitive changes in patients with HM undergoing HSCT. METHODS: Following PRISMA guidelines, PubMed, Scopus, and CINAHL were searched on October 30, 2025. Longitudinal studies assessing neurocognitive changes in patients with HM undergoing HSCT, with or without healthy controls, were included. Risk of bias was assessed using an adapted National Institutes of Health quality assessment tool for before-after studies. Effect sizes with 95% confidence intervals were calculated to quantify changes in neurocognitive performance. RESULTS: Nine of 2012 studies met the inclusion criteria, with overall moderate study quality. Improvements may occur post-HSCT; however, allogeneic HSCT and myeloablative conditioning were main risk factors identified for persistent cognitive decline. In line with white matter damage, executive function and attention/processing speed impairments likely represent core deficits, which may affect other cognitive impairments. Post-HSCT changes depend on task characteristics, cognitive load, and conditioning intensity. CONCLUSIONS: Future research should emphasize regular neurocognitive assessment to guide cognitive rehabilitation, implement pre-transplant cognitive rehabilitation strategies to mitigate post-HSCT cognitive decline, and enhance treatment outcomes.

Humans↗

PubMed2006

Recombinant urate oxidase (Rasburicase) for the treatment of hyperuricemia in pediatric patients with hematologic malignancies: Results of a compassionate prospective multicenter study in Korea.

BACKGROUND: Hyperuricemia accompanying tumor lysis syndrome is a serious complication in neoplasia with rapid proliferation and destruction. To confirm the efficacy of recombinant urate oxidase (rasburicase) and its safety profile, a phase IV compassionate use prospective study was performed in Korean pediatric patients with hematologic malignancies. PROCEDURE: Rasburicase was administered at 0.2 mg/kg/day once daily for 3-5 days (twice daily allowed during the first 72 hr) by intravenous route for hyperuricemia (uric acid > 7.5 mg/dl). The study period was 5 weeks and consisted of a baseline assessment within 48 hr before the administration of rasburicase, 3-5 days of assessment during treatment and a follow-up assessment at 4 weeks after its final administration. RESULTS: The uric acid endpoint (< or =7.0 mg/dl) was reached in 97.3% (36/37) of the patients and uric acid levels were significantly reduced in all patients (P < 0.001). Drug related toxicities were mild and reversible without any grade 4 or serious adverse event associated with rasburicase. CONCLUSION: This study confirms that rasburicase is a safe and effective agent for the treatment of hyperuricemia associated with hematologic malignancies in pediatric patients.

Adolescent↗

PubMed2005

Multicolor fluorescence in situ hybridization characterization of cytogenetically polyclonal hematologic malignancies.

Several different investigations and methodologies have provided data supporting a monoclonal origin of neoplasia. For example, the vast majority of neoplastic disorders are cytogenetically monoclonal. Occasionally, however, clones with unrelated karyotypic anomalies are found, as, for example, in approximately 2% of acute myeloid leukemias (AML), myelodysplastic syndromes (MDS), and chronic myeloproliferative disorders (CMD). Whether such a cytogenetic polyclonality represents a polyclonal origin or whether different clones share a submicroscopic primary change, indicating a monoclonal origin, remains to be elucidated. Our objective was to ascertain if cryptic aberrations can be found in cytogenetically polyclonal hematologic malignancies using multicolor fluorescence in situ hybridization (M-FISH). Fourteen AML, MDS, and CMD cases were investigated. In none of these was a cryptic aberration found, common to all subclones, although the karyotypes were revised in two AMLs and one MDS. Thus, all malignancies were still classified as polyclonal after the M-FISH analyses. Based on the present results, we conclude that M-FISH, in general, does not reveal primary cryptic aberrations supporting a monoclonal origin of cytogenetically polyclonal hematologic malignancies.

Adult↗

PubMed2004

Trends and antimicrobial resistance of pathogens causing bloodstream infections among febrile neutropenic adults with hematological malignancy.

BACKGROUND AND PURPOSE: The microbiological spectrum in cancer patients with febrile neutropenia has changed over the past several decades in western countries. The growing incidence of antimicrobial resistance is an inevitable consequence of the widespread use of antibiotics in medical settings. The aim of this study was to clarify the trends and antimicrobial resistance among pathogens causing bloodstream infections in febrile neutropenic adults with hematological malignancies. METHODS: The characteristics of pathogens causing bloodstream infection isolated from patients with febrile neutropenia who were treated at National Taiwan University Hospital from 1996 to 2001 were reviewed. A total of 1174 pathogens were isolated from 3093 admissions to a hematological ward during this period. Among them, 738 isolates were recovered from patients with febrile neutropenia. RESULTS: The majority (93%) of these neutropenic febrile patients had underlying acute leukemia or lymphoma. Gram-negative bacteria accounted for 57% of isolated pathogens, followed by Gram-positive bacteria (32%), fungi (7%), and anaerobes (3%). In decreasing frequency, Escherichia coli (13%), Klebsiella pneumoniae (12%), Enterobacter cloacae (7%), Pseudomonas aeruginosa (6%), and Acinetobacter baumannii (5%) were the predominant Gram-negative bacteria, while coagulase-negative staphylococci (13%), viridans group streptococci (4%), and Staphylococcus aureus (4%) were the major Gram-positive pathogens. Two-thirds (20/30) of S. aureus isolates were resistant to oxacillin. No vancomycin-resistant enterococci were isolated. Resistance to cefotaxime was found in 63% of E. cloacae, 13% of K. pneumoniae and 10% of E. coli. Overall, 33% of E. coli and 13% of K. pneumoniae were resistant to ciprofloxacin. CONCLUSIONS: This study indicates that the microbiological spectrum of microorganisms causing bloodstream infections in neutropenic febrile patients with hematological malignancies at National Taiwan University Hospital is different from western countries in that Gram-negative bacteria remain the predominant pathogens. Antimicrobial resistance among these pathogens is high and E. coli and K. pneumoniae isolates with resistance to third-generation cephalosporins and ciprofloxacin are increasing.

Adult↗

PubMed2004

A pilot study of cytoreductive chemotherapy combined with infusion of additional peripheral blood stem cells reserved at time of harvest for transplantation in case of relapsed hematologic malignancies after allogeneic peripheral blood stem cell transplant.

Reharvesting leukocytes from donors for a donor leukocyte infusion (DLI) is inconvenient and occasionally impossible in case of unrelated donors. It is well known that the effect of a growth factor-primed DLI is comparable to that of a nonprimed DLI. In total, 42 patients with hematologic malignancies and a high risk of relapse were allocated, on an intent-to-treat basis, a peripheral blood stem cell transplantation (PBSCT) from HLA-matched sibling donors, and then at the time of harvest, additional peripheral blood stem cells (PBSCs) were also reserved for a therapeutic primed DLI in case of relapse. In all, 12 patients who relapsed after allogeneic PBSCT were treated with mainly cytarabine-based chemotherapy followed by a cryopreserved PBSC infusion. The median dose of CD3+ and CD34+ cells for the primed DLIs was 1.43 x 10(8)/kg and 4.75 x 10(6)/kg, respectively. Six of the 12 relapsed patients exhibited a complete response after the primed DLI, plus their 1-year survival rate was 33%. The new development or progression of graft-versus-host disease after a primed DLI was observed in 50% of the patients. Overall, the survival at 1 year was 16.7%. Accordingly, the induction of a graft-versus-leukemia effect through a primed DLI, using additional PBSCs reserved at the original time of harvest, would appear to be feasible for patients with relapsed hematologic malignancies. Furthermore, this approach is also more convenient for donors.

Adoptive Transfer↗

PubMed2006

Prospective evaluation of a polymerase chain reaction-ELISA targeted to Aspergillus fumigatus and Aspergillus flavus for the early diagnosis of invasive aspergillosis in patients with hematological malignancies.

BACKGROUND: Current laboratory and radiological methods for diagnosis of invasive aspergillosis (IA) lack sensitivity and specificity. METHODS: We prospectively evaluated the diagnostic value of twice-weekly screening for circulating Aspergillus fumigatus and A. flavus DNA with a polymerase chain reaction-enzyme-linked immunosorbent assay (PCR-ELISA). RESULTS: Among the 201 adult patients with hematological malignancies who were included in the study, 55 IA cases were diagnosed. On the basis of the analysis of 1205 serum samples from 167 patients, the sensitivity, specificity, and positive and negative predictive values of the PCR-ELISA for proven and probable IA cases were 63.6%, 89.7%, 63.6%, and 89.7%, respectively, when samples with 2 consecutive positive results were used. The use of a combination of the PCR-ELISA and a galactomannan (GM) assay increased the sensitivity to 83.3%, increased the negative predictive value to 97.6%, and decreased the specificity to 69.8%. In most patients with IA, PCR-ELISA positivity anticipated or was simultaneous with the initiation of antifungal therapy, the abnormalities found by computed tomography, the mycological/histological diagnosis, and the GM positivity. Overall, 56.3% of the patients had at least 1 positive sample, and the false single-positive rate was 44.8%. CONCLUSIONS: In addition to serial screening for GM antigenemia and radiological surveillance, PCR-ELISA may improve the rates of early diagnosis of IA and the management of patients with hematological malignancies.

Aspergillosis↗

PubMed2004

Allergic conditions and risk of hematological malignancies in adults: a cohort study.

BACKGROUND: Two contradictory hypotheses have been proposed to explain the relationship between allergic conditions and malignancies, the immune surveillance hypothesis and the antigenic stimulation hypothesis. The former advocates that allergic conditions may be protective against development of cancer, whereas the latter proposes an increased risk. This relationship has been studied in several case-control studies, but only in a few cohort studies. METHODS: The association between allergic conditions and risk of developing leukemia, Hodgkin's disease, non-Hodgkin's lymphoma and myeloma was investigated in a cohort of 16,539 Swedish twins born 1886-1925. Prospectively collected, self-reported information about allergic conditions such as asthma, hay fever or eczema was obtained through questionnaires administered in 1967. The cohort was followed 1969-99 and cancer incidence was ascertained from the Swedish Cancer Registry. RESULTS: Hives and asthma tended to increase the risk of leukemia (relative risk [RR] = 2.1, 95% Confidence Interval [CI] 1.0-4.5 and RR = 1.6, 95% CI 0.8-3.5, respectively). There was also an indication of an increased risk of non-Hodgkin's lymphoma associated with eczema during childhood (RR = 2.3, 95% CI 1.0-5.3). CONCLUSION: In contrast to most previous studies, our results do not indicate a protective effect of allergic conditions on the risk of developing hematological malignancies. Rather, they suggest that allergic conditions might increase the risk of some hematological malignancies.

Adult↗

PubMed2002

Low infectious morbidity in patients with heavily pretreated hematological malignancies receiving autologous peripheral blood stem cell transplantation without antimicrobial prophylaxis.

The use of prophylactic antimicrobials during autologous peripheral blood stem cell transplantation (APBSCT) remains controversial. A prospective study was therefore conducted to examine whether the use of prophylactic antimicrobials is necessary. In this study, all the antimicrobials were given therapeutically rather than prophylactically. Twenty-three consecutive patients with heavily pretreated hematological malignancies were enrolled. All of the 23 patients had at least one episode of fever during APBSCT and most were fever of unknown origin (78.3%). Clinically or microbiologically documented infections occurred in only five patients (21.7%). These included bacteremias (three patients), perianal abscess (one patient), and catheter-related phlebitis (one patient). No death, invasive fungal infection, or serious adverse events occurred. The medium duration of fever, intravenous antimicrobial therapy, and hospital stay after transplantation were 5, 10, and 17 days, respectively. In conclusion, without using prophylactic antimicrobials, the infectious morbidity during APBSCT is low even in patients with heavily pretreated hematological malignancies.

Adult↗