title: Intra-axial endophytic primitive neuroectodermal tumors in the pons: clinical, radiological, and immunohistochemical aspects in four children.
abstract: We present the clinical findings, radiological aspects, operative results, and histopathological features of four typical primitive neuroectodermal tumors (PNET) located in the pontine region in children. All the tumors had an endophytic intra-axial growth pattern. All the children had a short history of severe neurological deficits with involvement of the cranial nerves and pyramidal tract. MRI did not reveal any common feature of malignancy. Compared to our successful experience in operations of intra-axial endophytic brainstem tumors in a total of 32 children, the outcome was poor: all 4 children died within 13 months. We conclude that PNET occurring in the pons is not as rare as was believed, and, compared to PNET in other areas the prognosis is worse.
authors.affiliation: Department of Neurosurgery, Georg-August-University, Göttingen, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Behnke
authors.forename: K
authors.initials: K
authors.lastname: Mursch
authors.forename: W
authors.initials: W
authors.lastname: Brück
authors.forename: H J
authors.initials: HJ
authors.lastname: Christen
authors.forename: E
authors.initials: E
authors.lastname: Markakis
mesh_terms: D000199:Actins; D000293:Adolescent; D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D002675:Child, Preschool; D003893:Desmin; D005260:Female; D005904:Glial Fibrillary Acidic Protein; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D007633:Keratins; D008279:Magnetic Resonance Imaging; D008297:Male; D009364:Neoplasm Recurrence, Local; D009419:Nerve Tissue Proteins; D018242:Neuroectodermal Tumors, Primitive / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D016900:Neurofilament Proteins; D010751:Phosphopyruvate Hydratase; D011149:Pons / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D011859:Radiography; D016708:Synaptophysin; D014746:Vimentin
chemical_list: D000199:Actins; D003893:Desmin; D005904:Glial Fibrillary Acidic Protein; D009419:Nerve Tissue Proteins; D016900:Neurofilament Proteins; D016708:Synaptophysin; D014746:Vimentin; D007633:Keratins; D010751:Phosphopyruvate Hydratase