title: t(11;14) Plasma cell disorder presents as a true nonsecretory, nonproducer multiple myeloma.
abstract: We describe an extremely rare case of so-called nonsecretory, nonproducer myeloma in an 80-year-old man who presented with weight loss and anemia. The patient's serum protein electrophoresis was negative for M protein spike, and quantitation of his immunoglobulin level was far below the normal range. The bone marrow biopsy showed a sheet-like diffuse plasmacytic infiltrate with essential absence of trilineage hematopoiesis. Flow cytometry analysis and immunohistochemical study demonstrated a strong CD38/CD138/immunoglobulin G heavy chain-positive plasma cell population but failed to detect either cytoplasmic kappa or lambda light chain expression. Chromosomal analysis and dual fluorescence in situ hybridization studies clearly demonstrated the presence of t(11;14)(q13;q32) translocation in the neoplastic plasma cells.
authors.affiliation: Department of Pathology, City of Hope National Medical Center, Duarte, CA 91010, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Mark Mc
authors.initials: MM
authors.lastname: Namara
authors.forename: Young
authors.initials: Y
authors.lastname: Kim
authors.forename: Qin
authors.initials: Q
authors.lastname: Huang
mesh_terms: D051997:ADP-ribosyl Cyclase 1 / Q000096:biosynthesis; D000369:Aged, 80 and over; D001853:Bone Marrow / Q000473:pathology*; D002880:Chromosomes, Human, Pair 11; D002883:Chromosomes, Human, Pair 14; D003937:Diagnosis, Differential; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism; D016130:Immunophenotyping; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D009101:Multiple Myeloma / Q000175:diagnosis / Q000235:genetics*; D010265:Paraproteinemias / Q000175:diagnosis / Q000235:genetics*; D053668:Syndecan-1 / Q000096:biosynthesis; D014178:Translocation, Genetic
chemical_list: D007074:Immunoglobulin G; D053668:Syndecan-1; D051997:ADP-ribosyl Cyclase 1