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Endocervical columnar cell intraepithelial neoplasia (ECCIN). 3. Interobserver variability in feature use
A J van Aspert van Erp1, A E van't Hof Grootenboer, G Brugal
1Laboratory for Cytopathology, University Hospital Nijmegen, Netherlands.
Summary
Cytotechnicians can accurately diagnose endocervical columnar cell abnormalities, including adenocarcinoma, by evaluating specific cellular and architectural features. Despite variations in individual assessment, high diagnostic accuracy was achieved for these cervical lesions.
Area of Science:
- Cervical Pathology
- Cytotechnology
- Histopathology
Background:
- Previous studies identified key cytomorphological and architectural features for diagnosing endocervical columnar cell abnormalities.
- These features are crucial for differentiating between normal epithelium, various grades of intraepithelial atypia, and invasive adenocarcinoma.
Purpose of the Study:
- To assess the individual performance of cytotechnicians in utilizing and grading specific features for endocervical lesion classification.
- To evaluate the consistency and accuracy of diagnoses based on subjective feature interpretation.
Main Methods:
- Five cytotechnicians evaluated a set of endocervical cell samples.
- Analysis focused on the use and grading of features identified in prior studies, including nuclear chromatin, cellular/nuclear size variation, cytoplasmic eosinophilia, and architectural patterns (crowding, clusters, gland formation, pseudostratification).
- Stepwise multiple regression analysis informed feature importance in previous work.
Main Results:
- Significant inter-observer variability was observed in the specific characteristics used and their grading.
- Despite variability, a strong correlation was consistently found between feature presence/expression and the degree of endocervical columnar cell atypia.
- An overall diagnostic accuracy of 87.6% (range 80-98.2%) was achieved, accepting a one-grade difference in severity.
Conclusions:
- Individual cytotechnicians may employ different criteria for diagnosing endocervical lesions, yet their assessments correlate with lesion severity.
- The identified cytomorphological and architectural features are reliable indicators for classifying endocervical columnar cell abnormalities.
- High diagnostic accuracy supports the utility of these features in routine cytopathological practice for cervical cancer screening.