Circulating peripheral blood plasma cells as a prognostic indicator in patients with primary systemic amyloidosis

Animesh Pardanani, Thomas E. Witzig, Georgene Schroeder, Edwin A. McElroy, Rafael Fonseca, Angela Dispenzieri, Martha O. Lacy, John A. Lust, Robert A. Kyle, Philip R. Greipp, Morie A. Gertz, S. Vincent Rajkumar

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

This study examined the prognostic value of circulating peripheral blood plasma cells (PBPCs) in patients with primary systemic amyloidosis (AL). A sensitive slide-based immunofluorescence technique was used to assess 147 patients for circulating PBPCs. Circulating monoclonal plasma cells were quantified as a percentage of circulating cytoplasmic immunoglobulin-positive cells (PBPC%). The absolute circulating plasma cell count was also determined. When analyzed retrospectively, 24 (16%) of 147 patients were found to have detectable circulating PBPCs. Overall survival for patients with high PBPC%'s (> 1%) was poorer (median survival, 10 vs 29 months; P = .002). Similarly, overall survival for patients with high PBPC counts (> 0.5 × 106/L) was significantly poorer (median, 13 vs 31 months; P = .003). Increased percentages of bone marrow plasma cells (BMPC%; P = .0004), increased levels of serum β2-microglobulin (P = .04), and dominant cardiac amyloid involvement (P= .03) also predicted poorer survival. The combined consideration of circulating PBPCs and BMPC% identified low-, intermediate-, and high-risk groups with median survivals of 37.5, 15.5, and 10 months, respectively (P = .0003). Multivariate analysis revealed circulating PBPCs and BMPC% to be independent prognostic factors for survival. Patients with PBPC%'s of 2% or higher were significantly more likely to have a coexisting clinical diagnosis of multiple myeloma (50% vs 12%, P = .008). The prognostic value of circulating PBPCs may help select treatment for patients with AL.

Original languageEnglish (US)
Pages (from-to)827-830
Number of pages4
JournalBlood
Volume101
Issue number3
DOIs
StatePublished - Feb 1 2003

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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