Medical College of Wisconsin
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Frequent detection of tumor cells in hematopoietic grafts in neuroblastoma and Ewing's sarcoma. Bone Marrow Transplant 1998 Nov;22(10):971-9



Pubmed ID




Scopus ID

2-s2.0-0031723262   58 Citations


Many poor-risk neuroblastomas and tumours of the Ewing's sarcoma family (ET) recur despite autologous transplants. Recurrence may be due to tumor cells contained in the BM harvests or PBSC harvests. The objectives of this prospective study were to: (1) determine the incidence and degree of tumor cell contamination in paired BM and PBSC harvests; and (2) determine the efficacy of tumor cell purging by immunomagnetic CD34+ cell selection. 198 samples from 11 consecutive patients with neuroblastoma or Ewing's sarcoma were analyzed. We assayed tumor contamination by RT-PCR assay for PGP 9.5, plus immunohistochemistry for neuroblastoma-specific antigens (the latter in neuroblastoma only). None of these patients had tumor cells detected in their BM by clinical histology immediately before BM or PBSC harvests. However, 82% of PBSC and 89% of backup BM harvests were contaminated with tumor by RT-PCR and/or immunocytochemistry assays. Unselected PBSC and BM harvests contained similar quantities of tumor cells (median, approximately 200000 cells). Cyclophosphamide plus G-CSF mobilization did not affect the incidence or level of contamination in PBSC harvests, as compared to blood obtained before mobilization. Immunomagnetic CD34+ cell selection depleted tumor cells by a median of 3.0 logs for PBSC, and 2.6 logs for BM harvests.

Author List

Leung W, Chen AR, Klann RC, Moss TJ, Davis JM, Noga SJ, Cohen KJ, Friedman AD, Small D, Schwartz CL, Borowitz MJ, Wharam MD, Paidas CN, Long CA, Karandish S, McMannis JD, Kastan MB, Civin CI


Cindy L. Schwartz MD, MPH Chief, Professor in the Pediatrics department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Antigens, CD34
Child, Preschool
Disease Progression
Granulocyte Colony-Stimulating Factor
Hematopoietic Stem Cell Mobilization
Hematopoietic Stem Cell Transplantation
Hematopoietic Stem Cells
Immunomagnetic Separation
Immunosuppressive Agents
Polymerase Chain Reaction
Prospective Studies
Sarcoma, Ewing
Survival Rate
Transplantation, Autologous
jenkins-FCD Prod-461 7d7c6113fc1a2757d2947d29fae5861c878125ab