Biomedical subjects

S A Ezzone

Publications and source records attributed to S A Ezzone.

9 recordsLinked to original sources

PubMed2001

Busulfan levels are influenced by prior treatment and are associated with hepatic veno-occlusive disease and early mortality but not with delayed complications following marrow transplantation.

Long-term outcome was analyzed in 28 patients transplanted between 1989 and 1992 following busulfan and cyclophosphamide and who had busulfan levels studied. While there was no significant correlation of busulfan levels with diagnosis, patients who had received extensive prior chemotherapy had a significantly higher area under the curve (AUC; P = 0.02) and maximum busulfan levels (Cmax; P = 0.03). High AUC was associated with the development of hepatic veno-occlusive disease (P = 0.03) and with early transplant-related mortality (P = 0.06). No significant correlation of busulfan levels with relapse, late non-relapse death, late complications, nor event-free survival was detected.

Adolescent↗

PubMed2000

Analysis of prognostic factors for allogeneic marrow transplantation following busulfan and cyclophosphamide in myelodysplastic syndrome and after leukemic transformation.

Prognostic factors in 42 patients aged 11 to 62 (median 46) years, with myelodysplastic syndrome (MDS) or after leukemic transformation, who underwent allogeneic marrow transplantation between 1984 and 1999 were analyzed. Thirty-six had advanced disease morphology; 19 had leukemic transformation. Twenty-nine received a preparative regimen of BuCy2 and 13 busulfan 14 mg/kg, etoposide 50 mg/kg and cyclophosphamide 120 mg/kg. Severe hepatic veno-occlusive disease (VOD) occurred in three patients all of whom received anti-leukemic chemotherapy prior to transplantation. Fifteen patients (36%) died from early transplant-related complications; nine patients relapsed. The estimated 4 year disease-free survival (DFS) was 35% (95% CI 26-44%). Older age was the most significant adverse prognostic factor. Patients with leukemic transformation who underwent early transplantation had significantly better DFS than those treated first with chemotherapy (P = 0.002). Delayed toxicity was rare in these patients; no late relapses occurred. Bone Marrow Transplantation (2000) 25, 1219-1222.

Adult↗

PubMed2000

Autotransplantation following busulfan, etoposide and cyclophosphamide in patients with non-Hodgkin's lymphoma.

The purpose of the study was to determine the toxicities and effectiveness of a novel preparative regimen of busulfan (Bu) 14 mg/kg, etoposide 50 or 60 mg/kg, and cyclophosphamide (Cy) 120 mg/kg in non-Hodgkin's lymphoma (NHL) and to analyze results using doses based on different body weight parameters and the two different etoposide doses. Three hundred and eighty-two patients aged 16 to 72 underwent first autologous transplantation with mobilized peripheral blood progenitor cells between August 1992 and December 1998 at either of two transplant centers. Mucositis was the most common toxicity. Hepatic toxicity was the most common life-threatening toxicity; severe hepatic VOD occurred in 11 patients (2.9%). Ten patients (2.6%) died from treatment-related toxicity. The 3-year progression-free survival (PFS) for the entire group was 46.9% (95% CI, 40.5-53.3%). Elevated LDH, resistance to chemotherapy, and intermediate/aggressive histology were significant adverse prognostic factors. For patients in sensitive first relapse PFS was 47.0% (95% CI, 37-57%). Neither etoposide dose nor body weight parameter utilized significantly affected outcome. In conclusion, the novel preparative regimen of Bu, etoposide and Cy results in a low incidence of treatment-related mortality and is effective in the treatment of patients with NHL. Bone Marrow Transplantation (2000) 25, 1243-1248.

Antineoplastic Combined Chemotherapy Protocols↗

PubMed2000

The influence of early transplantation, age, GVHD prevention regimen, and other factors on outcome of allogeneic transplantation for CML following BuCy.

Results in 164 patients who underwent allogeneic marrow transplantation following busulfan and cyclophosphamide over a 15 year period were analyzed. Age (median 37, range 14-66 years) did not significantly affect the incidence of graft-versus-host disease (GVHD), but patients who received methotrexate with cyclosporine had a significantly lower incidence (P = 0.002) of chronic GVHD compared to those who received methylprednisolone with cyclosporine. Hepatic veno-occlusive disease (VOD) occurred less frequently in chronic phase patients (P = 0.002) and in those transplanted shortly after diagnosis (P = 0.001). Five year leukemia-free survival (LFS) for the entire group was 49% (95% CI 41-57%). For 102 patients who underwent transplantation in chronic phase, results were significantly improved by transplantation at a short interval following diagnosis, particularly within 3 months (P = 0.01), by the use of methotrexate and not corticosteroids for GVHD prevention (P = 0.03), and by use of HLA-identical sibling donors (P = 0.01). Age was not a significant adverse prognostic factor and transplantation was successfully performed in individuals up to age 66. Allogeneic transplantation in CML, including older patients and those with unrelated donors, can be most safely and effectively performed shortly after diagnosis.

Adolescent↗

PubMed1999

Tumor lysis syndrome.

OBJECTIVES: To review the pathophysiology, clinical manifestations, and management of tumor lysis syndrome. DATA SOURCES: Published articles, case reports, and book chapters on tumor lysis syndrome. CONCLUSIONS: Tumor lysis syndrome is a very serious and sometimes life-threatening complication of cancer treatment. Identification of patients at risk and initiation of preventative interventions are the focus of medical and nursing management. Ongoing monitoring during and following cancer treatment is necessary to promote early response to changes in patient condition and minimize adverse events. IMPLICATIONS FOR NURSING PRACTICE: Early recognition of signs and symptoms and clinical management of tumor lysis syndrome is a challenging responsibility of the oncology nurse.

Adult↗

PubMed1999

SIADH.

Explore the source record for details and available documents.

Humans↗

PubMed1997

Mobilization of peripheral-blood progenitor cells with high-dose etoposide and granulocyte colony-stimulating factor in patients with breast cancer, non-Hodgkin's lymphoma, and Hodgkin's disease.

PURPOSE: We analyzed the safety and effectiveness of high-dose etoposide (2 g/m2) followed by granulocyte colony-stimulating factor (G-CSF) as a peripheral-blood progenitor cell (PBPC) mobilization regimen and assessed extent of tumor reduction in patients with breast cancer, non-Hodgkin's lymphoma (NHL), and Hodgkin's disease (HD). PATIENTS AND METHODS: One hundred sixty-nine consecutive patients who eventually underwent PBPC transplantation received treatment with high-dose etoposide (2 g/m2) followed by daily G-CSF (5 microg/kg). RESULTS: This mobilization method was effective in nearly all patients. No patients died of mobilization-related complications. A 50% reduction in tumor size was seen in 19% of assessable patients with breast cancer, 44% of those with NHL, and 38% of those with HD. Hematopoietic recovery (HR) following transplantation occurred in all patients. Patients with > or = 4 x 10(6) CD34+ cells/kg engrafted with neutrophils at a median of 9 days after transplant and patients with at least 1.2 x 10(6) CD34+/CD33- cells/kg achieved platelet recovery at a median of 15 days. CONCLUSION: Etoposide plus G-CSF is an effective and safe method for mobilization of PBPCs. Etoposide is an effective agent in tumor reduction in NHL and HD and is less effective in breast cancer. The substantially lower incidence of prior exposure to this agent compared with cyclophosphamide favors its use.

Adolescent↗

PubMed1996

Bone marrow engraftment following unrelated donor transplantation utilizing busulfan and cyclophosphamide preparatory chemotherapy.

Two major problems of unrelated donor transplantation have been an increased incidence of GVHD and graft failure. Even with HLA identity by microlymphocytotoxicity assay and non-reactive MLC, URD marrow transplant recipients have a higher incidence of graft rejection and GVHD. The preparative regimen busulfan 16 mg/kg and cyclophosphamide 120 mg/kg (BuCy2) has been shown to be at least as effective in preparation of recipients with CML of HLA-identical sibling grafts as cyclophosphamide and total body irradiation (Cy/TBI). However, concern about a high rejection rate in URD transplants has prevented most centers from using BuCy2 in this setting. From March 1990 to March 1994, 26 patients underwent URD transplantation following preparation with BuCy2. Patients received either standard cyclosporine and methotrexate or cyclosporine and methylprednisolone for GVHD prophylaxis. Two patients died on day 16 and 20 without evidence of hematopoietic engraftment. Of the 24 patients evaluable for engraftment, 23 (96%) had evidence of donor engraftment defined as an ANC > 0.5 x 10(9)/1. No patient who had initial engraftment had late graft failure. Within our study group the risk of graft rejection or graft failure does not appear to be higher than that reported for URD transplants utilizing TBI-containing regimens.

Acute Disease↗

PubMed1996

Influence of graft-versus-host disease on outcome following allogeneic transplantation with radiation-free preparative therapy in patients with advanced leukemia.

Between March 1984 and March 1995, 76 patients with advanced acute myelogenous, acute lymphoblastic, or chronic myelogenous leukemia underwent allogeneic marrow transplantation from HLA-identical or one-antigen mismatched sibling or unrelated donors. Patients received a preparative regimen consisting of busulfan 16 mg/kg and cyclophosphamide 120 mg/kg or busulfan 14 mg/kg, cyclophosphamide 120 mg/kg and etoposide (VP-16) 50 mg/kg. For GVHD prevention, patients received cyclosporine with either methotrexate or steroids or FK506 with methotrexate. Fourteen patients were leukemia-free survivors at a median of 6.5 years (range 1-11 years) following transplantation. For the group as a whole, the estimated leukemia-free survival (LFS) at 5 years is 20% (95% confidence interval 10-30%). Ten of the 14 leukemia-free survivors developed acute GVHD greater than grade II and chronic GVHD and two developed only chronic GVHD. Significantly better relapse rates and disease-free survival were associated with the development of acute and/or chronic GVHD. In the absence of acute GVHD and/or chronic GVHD, patients who underwent transplantation for advanced leukemia, after preparation with Bu/CY or Bu/CY/VP-16, were very likely to experience disease recurrence. Novel strategies designed to promote development of GVHD present a promising area for investigation to improve outcome in patients with leukemia at high risk for relapse.

Antineoplastic Combined Chemotherapy Protocols↗