Pap test--with or without vaginal smear?

Area of Science:

• Gynecologic Oncology
• Cytopathology
• Public Health Screening

Background:

• Cervical cancer screening aims to detect precancerous lesions and cancer early.
• Vaginal smears are sometimes included alongside cervical and endocervical samples in Pap tests.
• The utility of routine vaginal smears in primary cervical cancer screening requires evaluation.

Purpose of the Study:

• To assess the medical and economic justification of including vaginal smears in primary cervical cancer screening.
• To determine the diagnostic yield of vaginal smears for cervical abnormalities and other gynecologic conditions.
• To analyze the impact of age on the findings from vaginal smears.

Main Methods:

• Analysis of 245,048 VCE (vaginal, cervical, endocervical) smears from 2003-2008.
• Categorization of abnormal findings based on smear origin (vaginal only, vaginal and other, non-vaginal).
• Evaluation of cytological diagnoses and participant age for each category.

Main Results:

• 5.2% of smears showed abnormal findings; 0.35% of all findings had abnormalities exclusively in vaginal smears.
• Vaginal smears alone rarely detected invasive squamous cell carcinoma, primarily in women over 50 (2.3%).
• Vaginal smears exclusively identified 3.9% of atypical glandular cells (AGC) and 6.3% of adenocarcinomas, including endometrial types.

Conclusions:

• Routine vaginal smears are not justified for primary cervical cancer screening in women under 50 due to low yield for cervical lesions.
• Vaginal smears may contribute to detecting endometrial carcinoma, particularly in women over 50.
• Selective use of vaginal smears, possibly in older age groups, could be considered for broader gynecologic screening.