title: Waldenström's macroglobulinemia associated with AA amyloidosis.
abstract: It is widely accepted that amyloidosis in Waldenström's macroglobulinemia (WM) is exclusively due to amyloid light-chain deposition. However, only a small number of previous reports have actually characterized the type of amyloid in WM. We now report the third patient with WM and amyloid A protein (AA) amyloidosis. This patient developed malabsorption, nephrotic syndrome, and orthostatic hypotension. AA was immunohistochemically demonstrated in the rectal biopsy. In conjunction with previous examples of AA amyloidosis, the present report raises the possibility that AA amyloidosis may also occur in WM patients.
authors.affiliation: Hematology Unit, Rabin Medical Center, Petah-Tikva, Israel.
authors.forename: J
authors.initials: J
authors.lastname: Gardyn
authors.forename: A
authors.initials: A
authors.lastname: Schwartz
authors.forename: R
authors.initials: R
authors.lastname: Gal
authors.forename: U
authors.initials: U
authors.lastname: Lewinski
authors.forename: D
authors.initials: D
authors.lastname: Kristt
authors.forename: A M
authors.initials: AM
authors.lastname: Cohen
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000209:etiology* / Q000378:metabolism; D004396:Coloring Agents; D003224:Congo Red; D017809:Fatal Outcome; D006801:Humans; D008297:Male; D011196:Potassium Permanganate; D000685:Serum Amyloid A Protein / Q000032:analysis*; D008258:Waldenstrom Macroglobulinemia / Q000150:complications*
chemical_list: D004396:Coloring Agents; D000685:Serum Amyloid A Protein; D011196:Potassium Permanganate; D003224:Congo Red