Educational Needs and Causes of False Diagnosis of Atypical Squamous Cells of Unknown Significance at a University Hospital
Abstract
The entity of atypical squamous cells of undetermined significance (ASCUS) in The Bethesda System 2001 for reporting cervical cytology is characterized by equivocal diagnosis, poor reproducibility and debatable management. This retrospective study was done to analyse the causes of false ASCUS if any and identify the educational needs as part of quality assurance programme. Cervical smears of all ASCUS cases reported over the one-year period were reviewed by the Cytopathologist. Relevant clinical data was retrieved. ASCUS was the most common type of abnormality representing 43.0 % cases among 294 abnormal smears reported during study period. 16.0% cases were found to be non ASCUS on review. The main four causes of over use of ASCUS diagnosis were poor quality smears and cellular atypia associated with Candida infection, atrophy and squamous metaplasia. Educational measures are being undertaken to avoid over diagnosis and improve the patient management (Afr J Reprod Health 2011; 15[1]: 111-114).
Résumé
Causes des fausses cellules de l’épithélium atypique d’un diagnostic d’une signification inconnue et le besoin éducatif dans un Centre Hospitalier Universitaire. L’entité des cellules de l’épithélium atypique d’une signification non déterminée(CEAS) dans le système Bethesda 2001 destiné à la déclaration de la cytologie cervicale est caractérisée par le diagnostic équivoque, une mauvaise reproductivité et un traitement discutable. Cette étude rétrospective a été faite pour analyser les causes des fausses CEAS, si cela existe, et d’identifier les besoins éducatifs comme faisant partie du programme de l’assurance de qualité. Le Cytopathologue a passé en revue tous les frottis de tous les cas de la CEAS qui ont été déclarés au cours d’une année. Les données cliniques nécessaires ont été rétablies. La CEAS était l’anomalie la plus commune, ce qui représente 43,0% parmi les 294 frottis anomaux qui ont été déclarés au cours de la période de l’étude. A la revue, on a découvert que 16,0% n’étaient pas des CEAS. Les quatre causes principales du suremploi du diagnostic de la CEAS étaient la mauvaise qualité du frottis et l’atypie cellulaire liée à l’infection candidose, l’atrophie et la métaplasie squameuse. On prend des mesures éducatives pour éviter le surdiagnostic et pour améliorer le traitement de la patiente (Afr J Reprod Health 2011; 15[1]: 111-114).
Keywords: ASCUS, Cervical smear, Pap test, False diagnosis, Atrophy, Candida
Full Text:
PDFReferences
Cenci M, Chieppa A, Vecchione A. Controversial categories in cytopathology of the uterine cervix:
ASCUS: atypical squamous cells of undetermined significance. Minerva Ginecol. 2001;53:49-55.
Wright TC, Gatscha RM, Luff RD. et al. Epithelial cell abnormalities: squamous. In: The Bethesda System for Reporting Cervical Cytology. Solomon D, Nayar R, eds. New York, NY: Springer; 2003:89-121.
McGrath CM. ASCUS in Papanicolaou smears. Problems, controversies, and potential future directions. Am J Clin Pathol. 2002;117 :S62-75.
Kumar N, Sayed S, Moloo Z, Rana F. Global perspectives: the quest for Knowledge in Cytopathology Laboratory. “ Cytopathology Laboratory at the Aga
Khan University Hospital in Nairobi, Kenya”. The Bulletin, American Society of Cytopathology, September 2010, Vol. XLVII (5): 132-135.
Davey DD, Woodhouse S, Styer P, et al. Atypical epithelial cells and specimen adequacy: current laboratory practices of participants in the College of American Pathologists Interlaboratory Comparison Program in Cervicovaginal Cytology. Arch Pathol Lab Med. 2000;124:203-211.
Schmidt JL, Henriksen JC, McKeon DM. et al. Visual estimates of nucleus to nucleus ratios. Cancer cytopathology 2008; 114:287-293.
Flynn K, Rimm D. Diagnosis of "ASCUS" in women over age 50 is less likely to be associated with dysplasia. Diagn Cytopathol. 2001;24:132-136.
Abati A, Jaffurs W, Wilder AM. Squamous atypia in the atrophic cervical vaginal smear: a new look at an old problem. Cancer. 1998;84:218-225.
Wilbur DC, Dressel DM. Metaplastic variants of atypical squamous cells of undetermined significance: diagnosis and patient management issues. Pathol Case Rev. 1997; 2:53-57.
Raab SS, Bishop NS, Zaleski MS. Long-term outcome and relative risk in women with atypical squamous cells of undetermined significance. Am J Clin Pathol. 1999;112: 57-62.
Boulanger J.-C., Sevestre H. ASCUS: an update.
Gynécologie Obstétrique & Fertilité 2006 ; 34(1) : 4448.
Refbacks
- There are currently no refbacks.






