title: Labial salivary gland biopsy is a reliable test for the diagnosis of primary and secondary amyloidosis. A prospective clinical and immunohistologic study in 59 patients.
abstract: OBJECTIVE
  Reports of the detection of amyloidosis by labial salivary gland (LSG) biopsy have been mostly anecdotal. The aim of this study was to assess the value of this method in the diagnosis of amyloidosis.
  
  
  METHODS
  LSG biopsy tissues were studied with a combination method using Congo red stain and immunohistologic characterization using an antibody directed against the serum amyloid P (SAP) component. Electron microscopy was performed in all cases. In a prospective study, we evaluated 30 patients with biopsy-proven AA or AL amyloidosis. We compared these patients with a control group of 29 age-matched patients without clinical or biologic evidence of amyloid disease (14 had rheumatoid arthritis and 15 had plasma cell dyscrasia).
  
  
  RESULTS
  In 26 of the 30 patients with known systemic amyloidosis, amyloid deposits were identified on LSG biopsy (sensitivity of 86%). In 1 of the remaining patients, amyloid deposits were identified on LSG biopsy and systemic amyloidosis was confirmed by abdominal fat biopsy and 123I-labeled SAP scintigraphy.
  
  
  CONCLUSIONS
  This study emphasizes the high sensitivity of LSG biopsy in the diagnosis of amyloidosis, even in the absence of oral symptoms.
authors.affiliation: Department of Internal Medicine, Hôpital Claude Huriez, University of Lille, France.
authors.forename: E
authors.initials: E
authors.lastname: Hachulla
authors.forename: A
authors.initials: A
authors.lastname: Janin
authors.forename: R M
authors.initials: RM
authors.lastname: Flipo
authors.forename: R
authors.initials: R
authors.lastname: Saïle
authors.forename: T
authors.initials: T
authors.lastname: Facon
authors.forename: D
authors.initials: D
authors.lastname: Bataille
authors.forename: P
authors.initials: P
authors.lastname: Vanhille
authors.forename: P Y
authors.initials: PY
authors.lastname: Hatron
authors.forename: B
authors.initials: B
authors.lastname: Devulder
authors.forename: B
authors.initials: B
authors.lastname: Duquesnoy
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000686:Amyloidosis / Q000473:pathology*; D001706:Biopsy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012469:Salivary Glands / Q000737:chemistry / Q000473:pathology*; D012680:Sensitivity and Specificity; D000683:Serum Amyloid P-Component / Q000032:analysis*; D013194:Staining and Labeling
chemical_list: D000683:Serum Amyloid P-Component