Evaluation of prognostic significance of Revised International Staging System in multiple myeloma / 肿瘤

ABSTRACT

Objective: To analyze the influence of Revised International Staging System (RISS) on the prognosis and treatment of multiple myeloma (MM). Methods: The clinical information of two hundred and fifty-nine newly diagnosed patients with MM was retrospectively analyzed. The survival and prognosis of these MM patients was compared by using Durie-Salmon (DS) staging, International Staging System (ISS) and RISS, respectively. The influence of use of bortezomib and autologous stem cell transplantation (ASCT) on the prognosis of patients with MM according to RISS was evaluated. Results: The median age of 259 patients with MM was 58 years (range: 34-87 years). The ratio of male to female was 1.3: 1. The median follow-up time was 32 months (range: 1-188 months), and the median progression-free survival (PFS) and median survival time were 45 and 67 months, respectively. In 239 patients with MM according to DS staging, the patients with DS stage I, II and III MM were accounted for 4.2%, 16.7% and 79.1%, respectively; the median PFS were 68, 41 and 44 months, respectively (P = 0.496), and the median survival time were 99, 64 and 67 months (P = 0.478); the 5-year PFS rates were 60.0%, 38.1% and 31.3% (P = 0.208), and the 5-year overall survival (OS) rates were 60.0%, 60.9% and 53% (P = 0.533). In 236 patients with MM according to ISS, the patients with ISS stage I, II and III MM were accounted for 17.4%, 41.1% and 41.5%, respectively; the median PFS were 53, 48 and 38 months, respectively (P = 0.033), and the median survival time were 68, 92 and 57 months, respectively (P = 0.028); the 5-year PFS rates were 36.8%, 40.0% and 25.6% (P = 0.291), and the OS rates were 60.0%, 63.9% and 42.1%, respectively (P = 0.119). In 173 patients with MM according to RISS, the patients with RISS stage I, II and III MM were accounted for 9.2%, 81.6% and 9.2%, respectively; the median PFS were 68, 47 and 16 months (P = 0.022), and the median survival time were statistics not shown and 72 and 25 months, respectively (P = 0.001). The 5-year PFS rates were 55.6%, 34.7% and 11.1% (P = 0.049), and the OS rates were 80.0%, 59.2% and 22.2% (P = 0.012). The patients with RISS stage III MM had better prognosis in bortezomib-based combination chemotherapy group, and the median survival time was 30 months, which was longer than that of the routine chemotherapy group (14 months, P = 0.014). ASCT had significant difference neither in PFS nor in OS according to RISS (P > 0.05). Conclusion: The RISS is superior to DS staging and ISS in the prognostic significance. Patients with RISS stage III MM have poor prognosis, and the bortezomib can improve the prognosis.