title: Shunt migration into the sphenoid sinus: case report.
abstract: OBJECTIVE
  Shunt catheter migration is a potential complication of cerebrospinal fluid shunting procedures. We report an unusual case of proximal shunt migration into the sphenoid sinus. To our knowledge, there have been no previous reports of shunt migration through the bony structures of the cranial base.
  
  
  METHODS
  A 41-year-old man who had had a cyst-to-peritoneum shunt placed 21 years earlier for a temporal lobe arachnoid cyst presented with cerebrospinal fluid rhinorrhea. Neuroradiological imaging revealed migration of the shunt catheter through the medial wall of the middle temporal fossa into the sphenoid sinus.
  
  
  METHODS
  The patient underwent shunt removal and repair of the dural defect. Intraoperatively, the proximal catheter tip was found in the sphenoid sinus with dural and bony erosion. The patient made an uneventful recovery.
  
  
  CONCLUSIONS
  We present a unique long-term complication associated with intracranial shunt catheters. We hypothesize that excessive proximal catheter length and chronic cerebrospinal fluid pulsations contributed to migration of the catheter into the sphenoid sinus.
authors.affiliation: Department of Neurological Surgery, Johns Hopkins Hospital, Baltimore, Maryland, USA.
authors.forename: Khan W
authors.initials: KW
authors.lastname: Li
authors.forename: Elisa
authors.initials: E
authors.lastname: Ciceri
authors.forename: Giovanni
authors.initials: G
authors.lastname: Lasio
authors.forename: Carlo L
authors.initials: CL
authors.lastname: Solero
authors.forename: Francesco
authors.initials: F
authors.lastname: DiMeco
mesh_terms: D000328:Adult; D002559:Cerebrospinal Fluid Rhinorrhea / Q000175:diagnosis* / Q000209:etiology* / Q000601:surgery; D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects*; D035301:Cranial Fossa, Middle / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D020878:Device Removal; D005548:Foreign-Body Migration / Q000175:diagnosis* / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013101:Sphenoid Sinus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed