Cytology in the diagnosis of cervical cancer in symptomatic young women: a retrospective review.

BACKGROUND: Cervical cancer in young women presents a diagnostic challenge because gynaecological symptoms are common but underlying disease is rare.

AIM: To explore the potential for using cytology as a diagnostic aid for cervical cancer in young women.

DESIGN AND SETTING: Retrospective review of primary care records and cytology data from the national cervical screening database and national audit of cervical cancers.

METHOD: Four datasets of women aged 20-29 years in England were examined: primary care records and national screening data from an in-depth study of cervical cancers; cytology from the national audit of cervical cancers; whole-population cytology from the national screening database; and general-population primary care records from the Clinical Practice Research Datalink. The authors explored the sensitivity and positive predictive value (PPV) of symptomatic cytology (earliest <12 months before diagnosis) to cervical cancer.

RESULTS: The estimated prevalence of cervical cancer among symptomatic women was between 0.4% and 0.9%. The sensitivity of moderate dyskaryosis (high-grade squamous intraepithelial lesion [HSIL]) or worse in women aged 20-29 years was 90.9% to 96.2% across datasets, regardless of symptom status. The PPV was estimated to be between 10.0% and 30.0%. For women aged 20-24 years, the PPV of '?invasive squamous carcinoma' was 25.4%, and 2.0% for severe or worse cytology.

CONCLUSION: Cytology has value beyond screening, and could be used as a diagnostic aid for earlier detection of cervical cancer in young women with gynaecological symptoms by ruling in urgent referral.