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[Canal anal carcinoma].

Nabil Baba-Hamed1, Alix Portal2

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PubMed
Summary

Anal cancer, often caused by Human papillomavirus (HPV), is increasing, particularly in HIV-infected men who have sex with men (MSM). HPV vaccination and screening for anal intra-epithelial neoplasia offer hope for prevention and early detection.

Keywords:
canal anal carcinomahuman papillomas

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Area of Science:

  • Oncology
  • Virology
  • Public Health

Background:

  • Anal carcinoma incidence is rising, primarily linked to Human Papillomavirus (HPV), especially genotype 16.
  • High prevalence observed in HIV-infected men who have sex with men (MSM), highlighting a critical public health concern.
  • Primary prevention through HPV vaccination shows promise for this at-risk population.

Purpose of the Study:

  • To review the current understanding of anal carcinoma, focusing on its causes, risk factors, and management.
  • To emphasize the role of HPV vaccination and screening for anal intra-epithelial neoplasia (AIN) in prevention.
  • To outline treatment strategies and future therapeutic directions for anal cancer.

Main Methods:

  • Literature review of anal carcinoma, HPV, and related conditions.
  • Analysis of screening protocols for precancerous anal lesions (AIN).
  • Summary of current and emerging treatment modalities, including chemoradiation and surgical options.

Main Results:

  • Anal carcinomas are HPV-driven, with increased incidence in specific populations like HIV-infected MSM.
  • Screening identifies low-grade and high-grade anal intra-epithelial neoplasia (AIN) in at-risk individuals.
  • Combined chemoradiation achieves an 80% complete response rate; surgery is key for recurrence, and advanced disease may benefit from novel chemotherapy and immunotherapy.

Conclusions:

  • HPV vaccination and early detection of AIN are crucial for managing the rising incidence of anal cancer.
  • Multimodal treatment approaches, including chemoradiation and surgery, are effective, with ongoing research into immunotherapy.
  • Targeted screening and prevention strategies are vital for high-risk groups, particularly HIV-infected MSM.