title: Pseudotumoral amyloidosis of beta 2-microglobulin origin in the buttock of a patient receiving long term haemodialysis.
abstract: A 52 year old man who had been receiving haemodialysis for 13 years, with a history of renal tuberculosis, right ischial tuberculous osteomyelitis, and dialysis arthropathy, developed a soft tissue tumour in his left buttock. Histological analysis, immunohistological staining, and electron microscopic examination of the surgically removed tumour showed massive deposits of beta 2-microglobulin (beta 2-M) amyloid. This case shows the expanding clinical spectrum of this type of amyloidosis, and it is suggested that amyloid infiltration should be considered in the differential diagnosis of gluteal tumours in these patients.
authors.affiliation: Department of Pathology, Hospital Universitario Virgen del Rocio, Sevilla, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Fernández-Alonso
authors.forename: C
authors.initials: C
authors.lastname: Rios-Camacho
authors.forename: A
authors.initials: A
authors.lastname: Valenzuela-Castaño
authors.forename: J L
authors.initials: JL
authors.lastname: Rocha-Castilla
mesh_terms: D000686:Amyloidosis / Q000209:etiology* / Q000378:metabolism / Q000473:pathology; D002081:Buttocks; D006801:Humans; D007676:Kidney Failure, Chronic / Q000209:etiology; D008134:Long-Term Care; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis / Q000009:adverse effects*; D012983:Soft Tissue Neoplasms / Q000209:etiology* / Q000648:ultrastructure; D014398:Tuberculosis, Renal / Q000150:complications; D001613:beta 2-Microglobulin / Q000378:metabolism*
chemical_list: D001613:beta 2-Microglobulin