title: Solitary fibrous tumor of the spinal cord. Report of a case with scrape cytology.
abstract: BACKGROUND
  Solitary fibrous tumor is a rare spindle cell tumor and has been forced at a variety of sites. To the best of our knowledge, only two cases of solitary fibrous tumor arising in the spinal cord have been reported; no cytologic findings were documented.
  
  
  METHODS
  A 62-year-old male presented with a spinal cord tumor. A scrape smear of the resected tumor revealed naked, spindle-shaped nuclei. Some nuclei were twisted or had long spindles. In the background, abundant, thin and thick collagen fibers were present. Immunohistochemically, the spindle cells were positive for CD34 and negative for S-100 protein and alpha-smooth muscle actin. Histologic diagnosis of the tumor was benign solitary fibrous tumor.
  
  
  CONCLUSIONS
  Our case indicates that solitary fibrous tumor can occur in the spinal cord and should be differentiated from other benign spindle cell tumors, such as meningioma and schwannoma. The key cytologic features of solitary fibrous tumor may be the presence of abundant thin and thick collagen fibers in scrape specimens.
authors.affiliation: Department of Pathology, Kawasaki Medical School, Kurashiki, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kanahara
authors.forename: M
authors.initials: M
authors.lastname: Hirokawa
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.forename: K
authors.initials: K
authors.lastname: Terayama
authors.forename: E
authors.initials: E
authors.lastname: Nakamura
authors.forename: Y
authors.initials: Y
authors.lastname: Hino
authors.forename: Y
authors.initials: Y
authors.lastname: Mikawa
authors.forename: T
authors.initials: T
authors.lastname: Manabe
mesh_terms: D015415:Biomarkers; D003937:Diagnosis, Differential; D005350:Fibroma / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D013120:Spinal Cord Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure
chemical_list: D015415:Biomarkers