title: Localized orbital amyloidosis involving the lacrimal sac and nasolacrimal duct.
abstract: OBJECTIVE
  To report the case of a 70-year-old man who presented with tearing in his left eye and a firm palpable lump in the area overlying his left lacrimal sac.
  
  
  METHODS
  Retrospective interventional case report.
  
  
  METHODS
  Noninvasive diagnostic evaluation followed by external dacryocystorhinostomy, histopathologic studies, and systemic evaluation.
  
  
  RESULTS
  The patient was found to have idiopathic localized amyloidosis limited to the lacrimal sac and nasolacrimal duct.
  
  
  CONCLUSIONS
  The localized form of amyloidosis is rare, typically involves the head and neck without systemic manifestations, and carries an excellent prognosis. Previous reports of orbital amyloidosis have described involvement of the lacrimal gland, extraocular muscles, and the cranial nerves. To our knowledge, this is the first report of a patient with nasolacrimal duct obstruction secondary to amyloid deposition in the lacrimal sac and fossa.
authors.affiliation: New England Eye Center, Tufts University School of Medicine, Boston, Massachusetts, USA.
authors.forename: Marcus M
authors.initials: MM
authors.lastname: Marcet
authors.forename: Joo Heon
authors.initials: JH
authors.lastname: Roh
authors.forename: John T
authors.initials: JT
authors.lastname: Mandeville
authors.forename: John J
authors.initials: JJ
authors.lastname: Woog
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000473:pathology* / Q000601:surgery; D003608:Dacryocystorhinostomy; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000473:pathology* / Q000601:surgery; D008297:Male; D009301:Nasolacrimal Duct / Q000473:pathology*; D009916:Orbital Diseases / Q000473:pathology* / Q000601:surgery; D012189:Retrospective Studies