title: Rapid deterioration of renal function in a patient with multiple  myeloma associated with amyloid and light chain depositions.
abstract: Here we report a 75-year-old man with multiple myeloma who developed acute deterioration of renal function. Systemic AL amyloid deposition was found in the stomach, duodenum and brachial artery. A small amount of proteinuria without significant abnormal urinary sediments, increased excretion of urinary low-molecular-weight proteins and Bence Jones protein were observed. Significant renal Ga-67 uptake suggested acute tubulointerstitial lesions. Renal necropsy after sudden death 40 days after introduction of hemodialysis revealed mesangial expansion with glomerular basement membrane thickening, tubular basement membrane thickening with or without tubular atrophy and massive tubulointerstitial fibrosis. Slight amyloid depositions in the mesangium and vessels, and massive granular electron-dense deposits and deposition of monoclonal light chain lambda in renal basement membranes and vessels were found, indicating the rare condition of coexistence of amyloidosis and light chain deposition disease(LCDD). The rapid progression of renal failure may have been caused by massive deposition of monoclonal light chains in our patient.
authors.affiliation: The First Department of Medicine, Hamamatsu University School of Medicine, Higashi-ku, Hamamatsu, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Nakayama
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Fujigaki
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tsuji
authors.forename: Masanori
authors.initials: M
authors.lastname: Sakakima
authors.forename: Hideo
authors.initials: H
authors.lastname: Yasuda
authors.forename: Akashi
authors.initials: A
authors.lastname: Togawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Suzuki
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Fujikura
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kato
authors.forename: Satoshi
authors.initials: S
authors.lastname: Baba
authors.forename: Satoru
authors.initials: S
authors.lastname: Takahashi
authors.forename: Akira
authors.initials: A
authors.lastname: Hishida
mesh_terms: D058186:Acute Kidney Injury / Q000209:etiology* / Q000473:pathology; D000368:Aged; D000682:Amyloid / Q000378:metabolism*; D000686:Amyloidosis / Q000150:complications; D003645:Death, Sudden / Q000473:pathology; D017809:Fatal Outcome; D006801:Humans; D007147:Immunoglobulin Light Chains / Q000378:metabolism*; D007668:Kidney / Q000473:pathology; D008297:Male; D009101:Multiple Myeloma / Q000150:complications*
chemical_list: D000682:Amyloid; D007147:Immunoglobulin Light Chains