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Can LBC Completely Replace Conventional Pap Smear in Developing Countries.

Vasundhara Kamineni1, Priti Nair1, Ashok Deshpande2

  • 1Department of Obstetrics and Gynaecology, KAMSRC, LB Nagar, Hyderabad, India.

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Liquid-based cytology (LBC) reduces unsatisfactory cervical cancer screening slides and improves efficiency compared to conventional Pap smear (CPS). However, LBC's increased detection of low-grade lesions may not justify its cost in all settings.

Keywords:
AGUSASCUSHSILLSILLiquid-based cytologySCC

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Area of Science:

  • Gynecologic Oncology
  • Cytopathology
  • Public Health Screening

Background:

  • Cervical cancer screening relies on methods like conventional Pap smear (CPS) and liquid-based cytology (LBC).
  • Studies show conflicting results regarding the superiority of LBC over CPS.
  • LBC was implemented in our hospital, prompting a comparative study.

Purpose of the Study:

  • To compare LBC and CPS in terms of sensitivity, specificity, positive and negative predictive values.
  • To evaluate differences in turnover time, cost-effectiveness, and sample adequacy.
  • To assess the clinical utility of LBC versus CPS in women with unhealthy cervices.

Main Methods:

  • A prospective observational study involving 100 women with unhealthy cervices.
  • Sequential sample collection: 50 women had CPS followed by LBC, and 50 had LBC followed by CPS.
  • Comparative analysis of screening test performance and efficiency metrics.

Main Results:

  • Liquid-based cytology (LBC) resulted in fewer unsatisfactory slides and reduced turnover time compared to conventional Pap smear (CPS).
  • LBC demonstrated increased detection of atypical squamous cells of undetermined significance (ASCUS).
  • Detection rates for high-grade squamous intraepithelial lesions (HSIL) and squamous cell carcinoma (SCC) were comparable between LBC and CPS.

Conclusions:

  • While LBC offers advantages in slide adequacy and efficiency, its higher detection of low-grade lesions may increase healthcare costs and patient anxiety.
  • The benefits of LBC may be offset by increased follow-up testing, particularly in resource-limited settings.
  • It remains uncertain if LBC can fully replace CPS in low-resource environments.