title: Amyloid deposition in renal angiomyolipoma.
abstract: An irregular tumor shadow, seen on the left kidney in a 48-year-old woman by computed tomography, was pathologically diagnosed as 'angiomyolipoma'. HMB-45 immunoreactivity distinguished angiomyolipoma from renal cell carcinoma of sarcomatoid type. The amyloid deposition was limited to the tumor. M-protein and Bence-Jones protein were negative. For amyloid protein characterization, immunohistochemical studies were performed with antiamyloid A, anti-kappa, anti-lambda, anti-prealbumin and anti-beta-2 microglobulin, but none reacted with the amyloid. This is the first documented case of amyloid deposition in angiomyolipoma and may represent a novel precursor protein of amyloid.
authors.affiliation: Division of Surgical Pathology, Tokyo Medical University Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Toyoda
authors.forename: M
authors.initials: M
authors.lastname: Kudo
authors.forename: Y
authors.initials: Y
authors.lastname: Ebihara
mesh_terms: D000682:Amyloid / Q000276:immunology / Q000378:metabolism* / Q000648:ultrastructure; D000686:Amyloidosis / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D018207:Angiomyolipoma / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D000951:Antigens, Neoplasm / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D002292:Carcinoma, Renal Cell / Q000378:metabolism / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D007680:Kidney Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D058950:Melanoma-Specific Antigens; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000378:metabolism
chemical_list: D000682:Amyloid; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D058950:Melanoma-Specific Antigens; D009363:Neoplasm Proteins