title: Encephalocele in the ethmoid sinus presenting as a massive intracerebral hemorrhage after a "polypectomy": a case report.
abstract: The discovery of a congenital transethmoidal encephalocele in an adult patient is very rare and is sometimes misdiagnosed as a polyp of the ethmoid sinus. It is important to note that a congenital transethmoidal encephalocele presenting as a massive intracerebral hemorrhage in an adult patient has never been reported. This study's patient underwent endoscopic polypectomy and suffered from massive intracerebral hemorrhage because the encephalocele contained a frontobasal artery. Transcranial surgery was successfully performed to repair the frontal base. We report on the patient's condition and discuss the clinical implications of the present case.
authors.affiliation: Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan. nisizawa@hama-med.ac.jp
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nishizawa
authors.forename: Seiji
authors.initials: S
authors.lastname: Ohta
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Yamaguchi
mesh_terms: D001158:Arteries / Q000002:abnormalities; D002543:Cerebral Hemorrhage / Q000209:etiology* / Q000628:therapy; D002559:Cerebrospinal Fluid Rhinorrhea / Q000175:diagnosis / Q000209:etiology; D003937:Diagnosis, Differential; D004677:Encephalocele / Q000175:diagnosis* / Q000601:surgery*; D005005:Ethmoid Sinus / Q000002:abnormalities* / Q000601:surgery*; D005260:Female; D005625:Frontal Lobe / Q000002:abnormalities*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D015508:Nasal Obstruction / Q000209:etiology; D009298:Nasal Polyps / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology / Q000628:therapy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome