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- W2900522247 abstract "Abstract The current definition of plasma cell leukemia (PCL)— ≥ 20% circulating plasma cells (CPCs) on peripheral smear and plasma cell count ≥ 2 × 10 9 /L—may be too stringent. We reviewed outcomes of 176 multiple myeloma (MM) patients diagnosed between 1971 and 2016, and who had CPCs detectable at diagnosis, to determine whether a lower threshold could be used to diagnose PCL. Median overall survival (mOS) was 1.1 years (95% CI 0.8–1.4) and was similar between patients with < 5% ( n = 54, mOS = 1.4 years [0.7–2.0]), 5–19% ( n = 63, mOS = 1.1 years [0.7–1.4]), and ≥ 20% CPCs ( n = 59, mOS = 1.1 years [0.7–1.5], p = 0.349). As survival was similar between those with 5–19% and ≥ 20% CPCs, we stratified patients by < 5% (mOS = 1.4 years [0.7–2.0]) and ≥ 5% CPCs (mOS = 1.1 years [0.8–1.4], p = 0.154). Outcomes of those with ≥ 5% CPCs were much poorer when compared with a cohort of MM patients diagnosed between 1971 and 2016, who did not have CPCs at diagnosis ( n = 9724, mOS = 4.4 yrs [4.3–4.5], p < 0.001); survival was also lower in patients diagnosed after 2001 with ≥ 5% CPCs ( n = 62, mOS = 1.4 years [0.8–2.5]) compared with patients with standard risk ( n = 1326, mOS = 7.5 years [7.0–8.7]) and high-risk MM ( n = 381, mOS = 4.3 years [3.5–4.9], p < 0.001). We therefore propose that the definition of PCL be revised to patients with ≥ 5% CPCs on peripheral blood smear, who otherwise meet diagnostic criteria for MM." @default.
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- W2900522247 date "2018-11-15" @default.
- W2900522247 modified "2023-10-13" @default.
- W2900522247 title "Revised diagnostic criteria for plasma cell leukemia: results of a Mayo Clinic study with comparison of outcomes to multiple myeloma" @default.
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- W2900522247 doi "https://doi.org/10.1038/s41408-018-0140-1" @default.
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