title: Collagen balls in cervical smears. A previously undescribed finding.
abstract: OBJECTIVE
  To evaluate several conventional cervical smears obtained from women undergoing routine screening for cervical dysplasia or carcinoma and whose smears contained structures resembling collagen balls.
  
  
  METHODS
  Between 1995 and 1998, cervical smears containing collagen balls were analyzed. The clinical histories of the patients whose smears contained collagen balls, including the gestational history, were reviewed. Histopathologic material from any related surgical specimens was reviewed, with special attention to mesothelial surfaces.
  
  
  RESULTS
  Collagen balls were found in 5 of 77,891 Pap smears examined (0.006%). None of the patients had evidence of neoplasms of the genital tract. One of the patients was in the first trimester of pregnancy.
  
  
  CONCLUSIONS
  We suggest that collagen balls in cervical smear originate in mesothelium-covered organs, from where they are transported via the fallopian tubes into the uterine cavity. Their significance lies in their being mistaken for mucin-distended cells exfoliated from a neoplasm or from detached fragments of a papillary ovarian neoplasm.
authors.affiliation: Cytopathology Section, Department of Pathology, University of Chicago, 5841 South Maryland Avenue, MC 2050 (MARP-214), Chicago, Illinois 60637, USA.
authors.forename: Sunati
authors.initials: S
authors.lastname: Sahoo
authors.forename: Richard M
authors.initials: RM
authors.lastname: DeMay
mesh_terms: D000328:Adult; D002277:Carcinoma / Q000473:pathology*; D002584:Cervix Uteri / Q000473:pathology*; D003094:Collagen / Q000648:ultrastructure*; D003951:Diagnostic Errors / Q000517:prevention & control*; D004847:Epithelial Cells / Q000473:pathology; D004848:Epithelium / Q000473:pathology*; D005260:Female; D006801:Humans; D009077:Mucins / Q000032:analysis; D010051:Ovarian Neoplasms / Q000473:pathology; D065006:Papanicolaou Test; D002578:Uterine Cervical Dysplasia / Q000473:pathology*; D002583:Uterine Cervical Neoplasms / Q000473:pathology*; D014626:Vaginal Smears
chemical_list: D009077:Mucins; D003094:Collagen