title: Cytologic diagnosis of yolk sac tumor. A report of seven cases.
abstract: BACKGROUND
  Yolk sac tumor (YST) is a rare neoplasm that affects children and adolescents.
  
  
  METHODS
  Fine needle aspiration biopsies from seven patients with YSTs were reviewed. Eosinophilic hyaline cytoplasmic bodies and irregular deposits of basement membrane-like material were easily recognizable in aspiration smears. Some of the tumor cells contained cytoplasmic vacuoles. These features correlated well with histologic appearances.
  
  
  CONCLUSIONS
  These findings are significant in the fine needle aspiration biopsy diagnosis of YST. A preliminary cytologic diagnosis of this tumor is valuable as a guide in planning further diagnostic studies and therapy.
authors.affiliation: Clinical Cytology Department, Ankara University Medical School, Turkey.
authors.forename: B
authors.initials: B
authors.lastname: Mizrak
authors.forename: C
authors.initials: C
authors.lastname: Ekinci
mesh_terms: D001707:Biopsy, Needle; D002648:Child; D002675:Child, Preschool; D003584:Cytological Techniques; D018240:Endodermal Sinus Tumor / Q000473:pathology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male