학술논문
Outcomes of poor peripheral blood stem cell mobilizers with multiple myeloma at the first mobilization: A multicenter retrospective study in Japan
Document Type
article
Author
Yurie Miyamoto‐Nagai; Naoya Mimura; Nobuhiro Tsukada; Nobuyuki Aotsuka; Masaki Ri; Yuna Katsuoka; Toshio Wakayama; Rikio Suzuki; Yoriko Harazaki; Morio Matsumoto; Kyoya Kumagai; Takaaki Miyake; Shuji Ozaki; Katsuhiro Shono; Hiroaki Tanaka; Arika Shimura; Yoshiaki Kuroda; Kazutaka Sunami; Kazuhito Suzuki; Takeshi Yamashita; Kazuyuki Shimizu; Hirokazu Murakami; Masahiro Abe; Chiaki Nakaseko; Emiko Sakaida
Source
eJHaem, Vol 3, Iss 3, Pp 838-848 (2022)
Subject
Language
English
ISSN
2688-6146
Abstract
Abstract Autologous stem cell transplantation (ASCT) remains an important therapeutic strategy for multiple myeloma; however, a proportion of patients fail to mobilize a sufficient number of peripheral blood stem cells (PBSCs) to proceed to ASCT. In the present study, we aimed to clarify the characteristics and outcomes of poor mobilizers. Clinical data on poorly mobilized patients who underwent PBSC harvest for almost 10 years were retrospectively collected from 44 institutions in the Japanese Society of Myeloma (JSM). Poor mobilizers were defined as patients with less than 2 × 106/kg of CD34+ cells harvested at the first mobilization. The proportion of poor mobilization was 15.1%. A sufficient dataset including overall survival (OS) was evaluable in 258 poor mobilizers. Overall, 92 out of 258 (35.7%) poor mobilizers did not subsequently undergo ASCT, mainly due to an insufficient number of PBSCs. Median OS from apheresis was longer for poor mobilizers who underwent ASCT than for those who did not (86.0 vs. 61.9 mon., p = 0.02). OS from the diagnosis of poor mobilizers who underwent ASCT in our cohort was similar to those who underwent ASCT in the JSM database (3y OS rate, 86.8% vs. 85.9%). In this cohort, one‐third of poor mobilizers who did not undergo ASCT had relatively poor survival. In contrast, the OS improved in poor mobilizers who underwent ASCT. However, the OS of extremely poor mobilizers was short irrespective of ASCT.