Value of cytologic Papanicolaou smears and polymerase chain reaction screening for human papillomavirus DNA in detecting anal intraepithelial neoplasia

Comparison with histology of a surgical sample

Authors


  • Presented at the Annual Meeting of the French National Society of Gastroenterology; March 25-28, 2010; Paris, France and at the Annual Scientific Meeting of the American Society of Colon and Rectal Surgeons, May 15-19, 2010; Minneapolis, MN.

  • Members of the Cytological Diaconesses Group: Josée Bourguignon, MD; Hounaida Bouzid, MD; Johan Chanal, MD; Zouhair Dahmani, MD; Medhi Ksiaa, MD; Anne-Carole Lesage, MD; Nathalie Méary, MD; Benoit Mory, MD; Najat Mourra MD; Vincent de Parades, MD; Hélène Péré; Nabil Rabaï, MD; Hicham Rayk, MD; Delphine Rougeron; Samy Sultan, MD; Milad Taouk, MD; Christian Thomas, MD; and Jean-David Zeitoun, MD.

Abstract

BACKGROUND:

The performance of cytologic screening and its correlation with histology and polymerase chain reaction (PCR) detection of human papillomavirus (HPV) DNA have not been evaluated in populations with a low prevalence of anal intraepithelial neoplasia (AIN). The objective of the current study was to analyze the significance of abnormal smears relative to the histology and PCR detection of HPV DNA.

METHODS:

A cytologic smear and a viral sample were taken in 300 consecutive patients undergoing surgery (Milligan-Morgan hemorrhoidectomy and/or fissurectomy) who gave their informed consent.

RESULTS:

The cytologic smear was normal in 216 of 290 patients (74.5%). Four high-grade and 19 low-grade intraepithelial neoplastic lesions were identified. In 5 patients, high-grade lesions could not be excluded, 30 lesions were of undetermined significance, and there were 16 cellular modifications with a non-neoplastic appearance. The PCR test for HPV was positive in 18.7% of patients, and a high-risk genotype was identified in 63.6% of positive samples. Histologic examination of the surgical samples was normal in 92.3% of patients. The 23 AIN samples were distributed as follows: 13 grade 1 AIN (AIN1), 6 AIN2, and 4 AIN3. The sensitivity of cytologic smears and PCR for detecting AIN was 56% and 60.8%, respectively, and specificity was 77% and 84.5%, respectively. Combining the 2 tests increased sensitivity to 78% but decreased specificity to 68%.

CONCLUSIONS:

Compared with a large surgical sample, anal cytologic Papanicolaou smears and HPV PCR exhibited sensitivity and specificity that varied, depending on the risk of HPV infection and AIN. Positive HPV DNA screening increased with AIN grade, and high-risk HPV testing was particularly helpful. Cancer 2012. © 2012 American Cancer Society.

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