title: Fine needle aspiration cytology of neurothekeoma. A case report.
abstract: BACKGROUND
  Neurothekeoma (NT) is a rare, benign neoplasm of soft parts with a distinctive histologic appearance. To our knowledge, the cytologic findings have not been described before. We present a case of NT with the cytologic features on fine needle aspiration cytology (FNAC).
  
  
  METHODS
  A 54-year-old female presented with a circumscribed nodule in the left breast. The lesion was evaluated by FNAC. The smears showed an abundant, metachromatic, myxoid matrix with fusiform and epithelioid cells, some binucleated or multinucleated, loose or in groups and sometimes forming concentric whorls. The lesion was removed, and the diagnosis of NT was made after histopathologic study.
  
  
  CONCLUSIONS
  NT is an extremely rare neoplasm in the mammary region. Fusiform and epithelioid cells arranged in concentric whorls in a myxoid tumor of soft tissue are a distinctive characteristic of this neoplasm and can suggest the diagnosis.
authors.affiliation: Cytology Unit, Department of Pathology, University Hospital 12 de Octubre, Ctra Andalucía Km. 5.400, Madrid, Spain.
authors.forename: Agustín
authors.initials: A
authors.lastname: Vaillo Vinagre
authors.forename: Antonia
authors.initials: A
authors.lastname: Gutiérrez Martín
authors.forename: Andrés
authors.initials: A
authors.lastname: Pérez Barrios
authors.forename: Nuria
authors.initials: N
authors.lastname: Alberti Masgrau
authors.forename: Claudio
authors.initials: C
authors.lastname: Ballestín Carcavilla
authors.forename: Pedro
authors.initials: P
authors.lastname: De Agustín De Agustín
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis; D001707:Biopsy, Needle / Q000379:methods*; D001940:Breast / Q000473:pathology* / Q000601:surgery; D015622:Epithelioid Cells / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D018321:Neurothekeoma / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D012983:Soft Tissue Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D014746:Vimentin / Q000032:analysis
chemical_list: D014408:Biomarkers, Tumor; D014746:Vimentin