title: [The clinical features of patients with lymphoplasmacytic diseases harboring MyD88 L265P mutation].
abstract: Objective:To explore the clinical features of lymphoplasmacytic diseases with MyD88 L265P mutation.Methods:To analyze the distribution of MYD88 L265P mutation in patients with lymphoplasmacytic diseases by using of ARMS PCR-CE.Results:There were 25(30.9%) MyD88 L265P mutated patients in 81 patients. The mutation was frequently observed in 14 patients with WM (77.8%, 14/18), 2 patients with lymphoplasmacytic lymphoma (66.7%, 2/3), 1 acute lymphocytic leukemia patient (50.0%, 1/2), 3 multiple myeloma patients (30.0%, 3/10), 1 patient with monoclonal gammopathy of undetermined significance (25%, 1/4), 3 patients with chronic lymphocytic leukemia (13.0%, 3/23) and 1 lymphoma patient (4.8%, 1/21). 20 (80%, 20/25) patients were identified with IgM subtype. Compared with wild-type group of 56 cases, mutated patients were older (median age: 67 yearsvs55 years,P< 0.001), with lower WBC count (median count: 5.23 × 109/Lvs10.80 × 109/L,P=0.001), lower HGB level (median count: 85 g/Lvs119 g/L,P<0.001).Conclusion:MyD88 L265P mutation was mainly observed in patients with IgM subtype lymphoplasmacytic diseases, and Waldenstrom' s macroglobulinemia was the most common disease. Compared with the wild-type group, patients with MyD88 L265P mutation were older and had lower WBC count, lower level of HGB. However, further studies were needed to test the prognostic value of MyD88 L265P mutation.
authors.affiliation: First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis under Ministry of Health, Collaborative Innovation Center of Hematology, Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Ren
authors.forename: B Q
authors.initials: BQ
authors.lastname: Zhou
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: C C
authors.initials: CC
authors.lastname: Fu
authors.forename: H J
authors.initials: HJ
authors.lastname: Shen
authors.forename: Z X
authors.initials: ZX
authors.lastname: Ding
authors.forename: D P
authors.initials: DP
authors.lastname: Wu
mesh_terms: D005838:Genotype; D006801:Humans; D007075:Immunoglobulin M; D015451:Leukemia, Lymphocytic, Chronic, B-Cell; D008223:Lymphoma; D009101:Multiple Myeloma / Q000235:genetics*; D009154:Mutation; D053594:Myeloid Differentiation Factor 88 / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011379:Prognosis; D008258:Waldenstrom Macroglobulinemia / Q000235:genetics*
chemical_list: D007075:Immunoglobulin M; D053594:Myeloid Differentiation Factor 88