title: [The clinic and pathologic significance of plasma cell myeloma with CCND1].
abstract: OBJECTIVE
  To study the clinical and pathologic features of multiple myeloma(MM) with CCND1.
  
  
  METHODS
  Retrospectively analyzed the clinical and pathologic profiles of 158 patients with MM from 2010 to 2013. The clinical and morphologic features of bone marrow aspiration, biopsy and immunophenotypic analysis which was carried out by flow cytometry and immunohistochemistry were analyzed in all patients with MM respectively. CCND1 translocation was studied by FISH method in all cases. Classical cytogenetic studies of bone marrow were performed in 24 cases whose CCND1 was positive.
  
  
  RESULTS
  In the 158 patients with MM, CCND1 was detected in 31 patients (19.6%）. In 31 patients, type IgA, IgD, IgG, IgM, light-chain only and nonsecretory MM were 4 cases,4 cases,11 cases,1 case, 6 cases and 5 cases respectively. A high incidence of CCND1 was observed in IgD and nonsecretory MM comparied with IgA and IgG respectively (P<0.05). but no statistical significance was reached between κ and λ type patients (P=0.627). The morphology of plasma cell in bone marrow biopsies were small Lymphocyte- Like 24 cases,mature plasma cell 6 cases and immature plasma cell 1 case. Immunophenotype of all 31 cases was CD38⁺CD138⁺CD19⁻CD45⁻, (CD56⁺ in 11 cases, CD20⁺ in 9 cases, CD117⁺ in 3 cases. MM with CCND1 showed a strong association with CD20 expression, the lack of CD56 expression. Immunohistochemistry showed positive for cyclinD1 in 22 cases.
  
  
  CONCLUSIONS
  A high incidence of CCND1 was detected in the IgD and nonsecretory MM, and correlated with Small Lymphocyte- Like, higher positive rate of CD20, cyclinD1 and the lack of CD56 expression. MM with CCND1 must be distinguished from LPL and other mature B cell lymphomas which have plasmacytoid differentiation.
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Sun
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Gang
authors.initials: G
authors.lastname: An
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Enbin
authors.initials: E
authors.lastname: Liu
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Zhanqi
authors.initials: Z
authors.lastname: Li
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Hongju
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Qingying
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Fujun
authors.initials: F
authors.lastname: Sun
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Mu
authors.initials: M
authors.lastname: Xian
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Peihong
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Ru
mesh_terms: D001706:Biopsy; D001853:Bone Marrow; D019938:Cyclin D1 / Q000378:metabolism*; D005434:Flow Cytometry; D006801:Humans; D007150:Immunohistochemistry; D016130:Immunophenotyping; D017404:In Situ Hybridization, Fluorescence; D009101:Multiple Myeloma / Q000145:classification / Q000378:metabolism*; D010950:Plasma Cells; D012189:Retrospective Studies; D014178:Translocation, Genetic
chemical_list: C530104:CCND1 protein, human; D019938:Cyclin D1