title: Characterization and outcome of "hard to mobilize"' lymphoma patients undergoing autologous stem cell transplantation.
abstract: A "hard to mobilize" patient was defined as one in whom >or= 1x10(6) CD 34+ cells/kg cannot be obtained after two consecutive large volume aphereses. Forty-four consecutive Hodgkin's and non-Hodgkin's lymphoma patients who underwent autologous peripheral blood stem cell (PBSC) transplant treatment between June 1996 and June 1998 were included in this study. Twenty-one patients (48%) met the definition of "hard to mobilize" (Group I). All the rest of the patients (n=23) were the good mobilizers (Group II). The initial mobilization protocol for most patients was 10 microg/kg of G-CSF alone for both groups. For Group I, 7/21 (33%) patients were unable to achieve a minimal dose of >or= 1x10(6) CD34+ cells/kg even after a second mobilization attempt and/or bone marrow (BM) harvest (n=5). Overall, 11/21 (52%) required an additional mobilization and/or BM harvest. Only 3/21 (14%) patients were able to meet the target cell dose of >or= 2.5x10(6) CD34+ cells/kg (median of 4 apheresis). In contrast, 87% of Group II achieved the target dose with a median of 2 aphereses. Predictors of poor mobilization were greater than two prior treatment regimens (p=0.038) and the WBC count (<25,000/microL) on the first day of apheresis (p=0.053). Nineteen patients in Group I and all Group II completed treatment with a median time to engraftment of ANC>500/microl of 12 and 11 days, and platelet >20x10(3)/microl of 31 and 13 days, respectively. Outcome analysis revealed that 6/19 patients in Group I died of relapse within one year from transplant compared with only 2/23 of Group II who died of relapse (p=0.005, log rank test). There were no treatment related deaths in either group. Independent predictive features for "hard to mobilize" patients are a lack of significant increase in WBC count on the first day of apheresis and the number of prior treatment regimens. Poor mobilization appears to predict a worse outcome after autografting for lymphoma patients.
authors.affiliation: University of Florida, Gainesville, FL 32610-0277, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Sugrue
authors.forename: K
authors.initials: K
authors.lastname: Williams
authors.forename: B H
authors.initials: BH
authors.lastname: Pollock
authors.forename: S
authors.initials: S
authors.lastname: Khan
authors.forename: S
authors.initials: S
authors.lastname: Peracha
authors.forename: J R
authors.initials: JR
authors.lastname: Wingard
authors.forename: J S
authors.initials: JS
authors.lastname: Moreb
mesh_terms: D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D000368:Aged; D018952:Antigens, CD34 / Q000032:analysis; D015331:Cohort Studies; D005260:Female; D006085:Graft Survival; D019650:Hematopoietic Stem Cell Mobilization / Q000592:standards*; D018380:Hematopoietic Stem Cell Transplantation / Q000592:standards; D006689:Hodgkin Disease / Q000628:therapy; D006801:Humans; D007700:Kinetics; D008223:Lymphoma / Q000628:therapy*; D008228:Lymphoma, Non-Hodgkin / Q000628:therapy; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013234:Stem Cells / Q000276:immunology; D015996:Survival Rate; D014182:Transplantation, Autologous / Q000592:standards*; D016896:Treatment Outcome
chemical_list: D018952:Antigens, CD34