Objective: To ascertain the positive predictive value of both ?glandular neoplasia (national standard code 6) and borderline change (national standard code 8) in glandular cells in liquid-based cervical cytology specimens in Cardiff and Vale NHS Trust and to outline the histological outcomes of these cases.
Method: Eighty-nine liquid-based (Surepath) cervical cytology cases were retrospectively identified from a 2-year period (January 2005 to December 2006) and correlated with histopathological diagnoses.
Results: Initial punch biopsy histology revealed 18 cases (21%) of cervical glandular intraepithelial neoplasia (CGIN). A further nine cases (10%) of CGIN were identified following local excision or hysterectomy. Ten cases of invasive malignancy were identified: four endocervical adenocarcinomas (all node negative, TNM stage T1b1), five endometrial adenocarcinomas and one squamous cell carcinoma. There were 10 with high-grade cervical intraepithelial neoplasia (CIN) alone. Women diagnosed with endometrial malignancy presented later with an average age of 64.6 years compared with 34.9 years for endocervical lesions. Taking high-grade CIN or worse as a positive outcome, the overall positive predictive value (PPV) of glandular abnormalities on cytology (both code 6 and 8) was 58.1% [95% confidence interval (CI) 47.8, 68.4]. PPV for borderline change in glandular cells alone was 24.1% (95% CI 8.5, 39.6) and for ?glandular neoplasia alone 75.4% (95% CI 64.3, 86.5).
Conclusion: With our interpretation of the classification, women with cytological diagnoses of glandular neoplasia of the cervix should initially be investigated by local resection rather than punch biopsy, and those with borderline change in glandular cells with repeat cytology.
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