title: A supratentorial primitive neuroectodermal tumor presenting with intracranial hemorrhage in a 42-year-old man: a case report and review of the literature.
abstract: BACKGROUND
  We report on a very rare case of a supratentorial primitive neuroectodermal tumor in an adult, which presented with intracerebral hemorrhage, and review the relevant medical literature.
  
  
  METHODS
  A 42-year-old Caucasian man complained of a sudden headache and nausea-vomiting. The patient rapidly deteriorated to coma. An emergency computed tomography scan showed an extensive intraparenchymal hemorrhage that caused significant mass effect and tonsilar herniation. During surgery, an increased intracranial pressure was recorded and extensive bilateral decompressive craniectomies were performed. A cherry-like intraparenchymal lesion was found in his right frontal lobe and resected. The patient died in the intensive care unit after approximately 48 hours. The resected lesion was identified as a central nervous system primitive neuroectodermal tumor.
  
  
  CONCLUSIONS
  Supratentorial primitive neuroectodermal tumors must be considered in the differential diagnosis of space-occupying lesions in adults. Spontaneous supratentorial hemorrhage due to primitive neuroectodermal tumors is an extremely rare but potentially lethal event.
authors.affiliation: Department of Neurosurgery, University Hospital of Larissa, School of Medicine, University of Thessaly, Building A, 3rd Floor, Biopolis, Larisa, 41110, Greece. kpaterakis@yahoo.com.
authors.forename: Evangelos K
authors.initials: EK
authors.lastname: Papadopoulos
authors.forename: Kostas N
authors.initials: KN
authors.lastname: Fountas
authors.forename: Alexandros G
authors.initials: AG
authors.lastname: Brotis
authors.forename: Konstantinos N
authors.initials: KN
authors.lastname: Paterakis
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