Review of the Bethesda System atlas does not improve reproducibility or accuracy in the classification of atypical squamous cells of undetermined significance smears

The Bethesda System (TBS) and its accompanying atlas were developed to promote uniform diagnosis and reporting of cervical and vaginal cytology, especially with respect to borderline abnormal smears. The authors assessed whether group study of TBS atlas improves the reproducibility and accuracy of the cytopathologic diagnosis of equivocal Papanicolaou smears.

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