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  • Title: Anal-rectal cytology: correlation with human papillomavirus status and biopsy diagnoses in a population of HIV-positive patients.
    Author: Bean SM, Chhieng DC, Roberson J, Raper JL, Broker TR, Hoesley CJ, Eltoum IA, Jin G.
    Journal: J Low Genit Tract Dis; 2010 Apr; 14(2):90-6. PubMed ID: 20354415.
    Abstract:
    OBJECTIVES: We describe the cytological distribution of disease, correlate cytological diagnoses with human papillomavirus (HPV) DNA status and surgical biopsy diagnoses, determine if CD4 counts correlate with lesion severity, and compare anal-rectal data of HIV-infected patients (primarily men) with cervical data. MATERIALS AND METHODS: A retrospective search of the computerized database identified 118 HIV-positive patients who had anal-rectal cytology. Cytology results were compared with available follow-up data including repeat anal-rectal cytology tests, surgical biopsy, CD4 counts, and HPV DNA polymerase chain reaction-based genotyping. RESULTS: Cytological diagnoses included 3% unsatisfactory for diagnosis, 41% negative for intraepithelial lesion or malignancy (NILM), 23% atypical squamous cells of undermined significance (ASC-US), 31% low-grade squamous intraepithelial lesion (LSIL), and 2% high-grade squamous intraepithelial lesion (HSIL) (ASC-US/squamous intraepithelial lesion, 0.7:1). Two anal intraepithelial neoplasia (AIN) II, 10 AIN III, and 1 invasive squamous cell carcinoma were histologically detected (11%). The majority of AIN II was preceded by LSIL, 54%; ASC-US, 15%; and HSIL, 8%. The false-negative fraction was 23%. Sensitivity, specificity, negative predictive value, and positive predictive value were 92%, 8%, 33%, and 67%, respectively. Of those HPV tested concurrent with the first cytology specimen, 48% NILM, 78% ASC-US, and 100% LSIL were HPV positive. Mean CD4 counts (per microliter) were lower in patients with HSIL (243 [SD, 65]) compared with LSIL (400 [SD, 261]) and NILM (428 [SD, 232]). CONCLUSIONS: Anal-rectal cytology is a useful screening test. A high percentage of AIN II lesions were detected in this at-risk population, and the majority was detected following cytological abnormality.
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