[Effect of Body Mass Index on the Prognosis of Mantle Cell Lymphoma].

Objective: To explore the correlation between different body mass index (BMI) and prognosis of mantle cell lymphoma (MCL).

Methods: The clinical characteristics and biological indices of 108 patients with MCL treated in Fujian Medical University Union Hospital were retrospectively analyzed, and the effects of different BMI on overall survival (OS) and progression-free survival (PFS) were analyzed. The correlation between BMI and B symptoms, LDH and Ki-67 was further observed. Furthermore，the differences of BMI between Autologous peripheral blood stem cell transplantation(Auto-PBSCT) and conventional chemotherapy groups were explored.

Results: Among 108 patients, the median age at diagnosis was 59（25-79） years old, and the male to female ratio was 4.4∶1. 88.89% of patients with Ann Arbor staging III-IV, 63.89% with bone marrow involvement, and 49.07% with splenic infiltration. Patients with BMI ≥ 24 kg/m were divided into two groups: the high BMI group and the low BMI group. The 5-year PFS and OS of patients in the low BMI group were 31.9% and 47.0%, respectively, while those in the high BMI group were 64.6% and 68.7%, respectively. The incidence of death in the high BMI group was lower than that of the low BMI group (＜0.01). In multivariate analysis, BMI was an independent predictor of PFS (=0.282; 95% : 0.122-0.651; =0.003) and an independent predictor of OS (=0.299; 95% : 0.129-0.693; =0.005). Also, patients with B symptoms had a lower BMI than those without B symptoms (=0.01), but BMI had no effect on patients' LDH and Ki-67. The prognosis of 16 patients treated with Auto-PBSCT was significantly better than that of the conventional chemotherapy group. There was no significant difference in BMI between Auto-PBSCT group and conventional chemotherapy group.

Conclusion: BMI is an independent prognostic factor for PFS and OS in MCL, and may be influenced by the effect of B symptoms on BMI.