title: Cranial Pilocytic Astrocytoma With Spinal Drop Metastasis in an Adult: Case Report and Literature Review.
abstract: BACKGROUND
  Pilocytic astrocytoma (PA) is a benign neoplasm that typically occurs in the brain within the pediatric and adolescent age groups and is uncommon in adults. It rarely occurs within the ventricles, and the overall prognosis is favorable. A PA of the brain with spinal metastasis at presentation has never been reported in an adult.
  
  
  METHODS
  We report a case of a 47-year-old man presenting with sudden-onset frontal headache associated with nausea and lethargy in addition to a background of a longer history of back pain and headache. Radiologic imaging revealed an acute intraparenchymal hemorrhage in the right parieto-occipital lobes with intraventricular extension within a peripherally enhancing heterogeneous lesion. Magnetic resonance imaging of the spine revealed a sacral intradural tumor. The patient underwent surgical resection of the intracranial mass followed by debulking of the spinal lesion. Histopathologic study revealed that both the cranial and spinal tumors were PA.
  
  
  CONCLUSIONS
  This case illustrates a unique instance of hemorrhage into a cerebral PA with a spinal metastasis. To our knowledge, this is the first such case reported in an adult. We review the literature on the subject.
authors.affiliation: Department of Neurosurgery, Monash Medical Centre, Melbourne, Australia. Electronic address: aasheenm@gmail.com.
authors.forename: Aasheen
authors.initials: A
authors.lastname: Munshey
authors.affiliation: Department of Neurosurgery, Monash Medical Centre, Melbourne, Australia.
authors.forename: Justin
authors.initials: J
authors.lastname: Moore
authors.affiliation: Department of Anatomical Pathology, Alfred Hospital, Melbourne, Australia.
authors.forename: Catriona
authors.initials: C
authors.lastname: Maclean
authors.affiliation: Department of Anatomical Pathology, Monash Medical Centre, Melbourne, Australia.
authors.forename: Anthony
authors.initials: A
authors.lastname: Longano
authors.affiliation: Department of Neurosurgery, Monash Medical Centre, Melbourne, Australia; Department of Surgery and Monash Institute of Medical Research, Monash University, Melbourne, Australia.
authors.forename: Tony
authors.initials: T
authors.lastname: Goldschlager
mesh_terms: D001254:Astrocytoma / Q000473:pathology*; D001932:Brain Neoplasms / Q000473:pathology*; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D006801:Humans; D019394:Ki-67 Antigen / Q000378:metabolism; D007796:Laminectomy / Q000379:methods*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013120:Spinal Cord Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery*
chemical_list: D005904:Glial Fibrillary Acidic Protein; D019394:Ki-67 Antigen
keywords: Adult; Low-grade glioma; Metastasis; Pilocytic astrocytoma