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Blood, 1 January 2005, Vol. 105, No. 1, pp. 358-360. Prepublished online as a Blood First Edition Paper on August 31, 2004; DOI 10.1182/blood-2004-04-1363.
NEOPLASIA p53 gene deletion detected by fluorescence in situ hybridization is an adverse prognostic factor for patients with multiple myeloma following autologous stem cell transplantationFrom the Department of Laboratory Hematology, Department of Laboratory Medicine and Pathobiology, Department of Biostatistics, and Department of Medical Oncology and Hematology, Princess Margaret Hospital/University Health Network, and McLaughlin Center for Molecular Medicine, University of Toronto, Toronto, ON, Canada.
We investigated the relevance of p53 deletions to the clinical outcome of patients with multiple myeloma (MM) treated with high-dose chemotherapy and autologous stem cell transplantation. Hemizygous p53 gene deletions were detected by fluorescence in situ hybridization in 10 of 105 (9.5%) patients studied. p53 deletions were associated with higher serum calcium (P = .0062) and creatinine (P = .013) levels, but there were no association with patient age, gender,
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| Copyright © 2005 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||
2-microglobulin, C-reactive protein, hemoglobin, albumin or bone lytic lesions, or immunoglobulin isotype. There were no associations of p53 deletions with 13q deletions or translocations t(11;14) or t(4;14). Patients with p53 deletions had significantly shorter progression-free (median, 7.9 versus 25.7 months, P = .0324) and overall survival (median, 14.7 versus 48.1 months, P = .0008) than patients without a p53 deletion. A multivariate analysis confirmed p53 deletion was an independent prognostic factor predicting shortened progression-free (P = .0009) or overall survival (P = .0002) in patients with MM after high-dose chemotherapy and autologous stem cell transplantation. (Blood. 2005;105:358-360) 
