title: An unusual case of mediastinal lymphadenopathy caused by amyloidosis.
abstract: A 71-year-old Japanese female Nagasaki-atomic-bomb survivor was admitted for evaluation of a mediastinal mass. She was infected with human T-cell leukemia virus type I. Histological examination of the biopsy specimen, obtained thoracoscopically from the mass, revealed amyloid lymphadenopathy confirmed by Congo-red staining and electron-microscopic examination. Amyloid deposits and the serum monoclonal peak consisted of immunoglobulin lambda light chains. No atypical cells were detected in bone marrow. The case was diagnosed as an unusual amyloidosis affecting the mediastinal lymph node. No other sites were found to be affected by amyloidosis, although systemic involvement could not be conclusively ruled out.
authors.affiliation: Department of Medicine, Keio University School of Medicine, Tokyo.
authors.forename: K
authors.initials: K
authors.lastname: Takeshita
authors.forename: S
authors.initials: S
authors.lastname: Yamada
authors.forename: N
authors.initials: N
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Kuwabara
authors.forename: K
authors.initials: K
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Asano
authors.forename: K
authors.initials: K
authors.lastname: Yamaguchi
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000150:complications*; D005260:Female; D015490:HTLV-I Infections / Q000150:complications; D006801:Humans; D007146:Immunoglobulin lambda-Chains / Q000032:analysis; D008198:Lymph Nodes / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology*; D008206:Lymphatic Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D008477:Mediastinal Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D007146:Immunoglobulin lambda-Chains