title: [Infra-saccular lacrimal duct stenosis caused by bone thickening of the inner nasal bones in tuberous sclerosis].
abstract: BACKGROUND
  Patients with tuberous sclerosis (Morbus Bourneville-Pringle) may show hamartomatous tumors of different organ systems. 50% of patients display astrocytic hamartomas of the retina. The skeletal system is affected in 40%: peri-, en- or exostoses, or cysts may occur. To the best of our knowledge, there are only three descriptions of an involvement of the facial skeleton in the literature.
  
  
  METHODS
  A 54-year-old man presented with recurrent dacryocystitis and lacrimal duct obstruction. Tuberous sclerosis and epilepsy were present since childhood. Besides typical skin lesions and intracranial calcified astrocytomas a retinal astrocytoma was detected in his left eye. Coronal CT scan revealed endonasal bone thickening involving the nasal floor, conchae and lateral walls. Evidence of maxillary and ethmoidal sinusitis was also present.
  
  
  CONCLUSIONS
  The endonasal findings in our patient are most likely a manifestation of tuberous sclerosis of the facial skeleton. They may have favored the development of marked sinusitis and lacrimal duct obstruction.
authors.affiliation: Augenklinik mit Poliklinik, Friedrich-Alexander-Universität Erlangen-Nürnberg.
authors.forename: W M
authors.initials: WM
authors.lastname: Budde
authors.forename: R
authors.initials: R
authors.lastname: Schelp
authors.forename: L M
authors.initials: LM
authors.lastname: Holbach
mesh_terms: D003607:Dacryocystitis / Q000209:etiology*; D003937:Diagnosis, Differential; D005357:Fibrous Dysplasia of Bone / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D007767:Lacrimal Duct Obstruction / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009295:Nasal Bone / Q000473:pathology*; D009301:Nasolacrimal Duct / Q000473:pathology*; D014057:Tomography, X-Ray Computed; D014402:Tuberous Sclerosis / Q000150:complications* / Q000175:diagnosis