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Preliminary results of a screening program for anal cancer and its precursors for HIV-infected men who have sex with men in Vigo-Spain.

Preliminary results of a screening program for anal cancer and its precursors for HIV-infected men who have sex with men in Vigo-Spain.
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Iribarren Díaz M, Ocampo Hermida A, González-Carreró Fojón J, Longueira Suárez R, Rivera Gallego A, Casal Núñez E, Ocampo Álvarez A, Cachay E,


Iribarren Díaz M, Ocampo Hermida A, González-Carreró Fojón J, Longueira Suárez R, Rivera Gallego A, Casal Núñez E, Ocampo Álvarez A, Cachay E, (click to view)

Iribarren Díaz M, Ocampo Hermida A, González-Carreró Fojón J, Longueira Suárez R, Rivera Gallego A, Casal Núñez E, Ocampo Álvarez A, Cachay E,

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Revista espanola de enfermedades digestivas : organo oficial de la Sociedad Espanola de Patologia Digestiva 2017 02 23() doi 10.17235/reed.2017.4274/2016

Abstract
BACKGROUND
Men who have sex with men (MSM) infected with human immunodeficiency virus (HIV) have the highest risk of developing anal cancer (AC). The objective of this study was to describe our screening implementation program in this population, and report the prevalence of human papillomavirus (HPV) anal infection, and cytological and histological findings in a Spanish medium-size community (Vigo, Spain).

METHOD
Prospective cohort analysis of 240 HIV-infected MSM. Cellular anal sample and high risk HPV (HR-HPV)-tests were performed to study cytological changes and HPV genotyping. High resolution anoscopy (HRA) was performed in 209 patients. Results were analyzed with respect to epidemiological, clinical and analytical factors.

RESULTS
Of 209 patients selected for HRA, the prevalence of HR-HPV anal infection, cytological and histological alterations was 85.6%, 47.5%, and 39.8%, respectively. Sensitivity and specificity for ≥ ASCUS (atypia of squamous cells of undetermined significance) cytology in relation to histological alterations were 61% and 85%, (OR: 8.7; IC 95%: 4.4-17.2), respectively. Observed concordance between high-grade squamous intraepithelial lesion (HSIL) cytology and HSIL anal intraepithelial neoplasia types 2 and 3 (AIN-2/3) histology was 64% (OR: 11.4; IC 95%: 3.6-36.7). One patient with HSIL cytology presented a prevalent anal squamous carcinoma.

CONCLUSIONS
HRA was feasible with similar results to relevant groups. There was a high prevalence of anal HR-HPV infection, and cytological and histological alterations.

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