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The Diagnostic and Therapeutic Challenge of Anal Intraepithelial Neoplasia
Paul Rider1, John Hunter2, Leander Grimm2
1Department of Surgery, Division of Colon and Rectal Surgery, University of South Alabama, 2451 USA Medical Center Drive, Mastin Building, Suite 702, Mobile, AL, 36617, USA. prider@health.southalabma.edu.
Purpose Of Review:
No single modality of care serves as the defined best practice for the treatment of anal intraepithelial neoplasia (AIN). This review aims to present the common treatment modalities germane to AIN while considering evolving evidence.
Recent Findings:
AIN affords an opportunity to evaluate and treat patients before the development of invasive diseases. Efforts to screen for AIN have yielded mixed results. The major available pharmacotheraputic and surgical options offer efficacious options to reduce the bioburden of disease but can be met with high levels of recurrent disease. None affords a predictably durable response in severe disease. Vaccination as primary prevention will likely reduce the overall upward trend in AIN. Evidence suggests vaccination also affords improvement in recurrent disease. Early evidence reveals potential benefit in multimodal approaches to control AIN. Valuable data is anticipated from the phase III, randomized ANCHOR study evaluating the management of high-grade AIN in HIV +patients.
Insights
Treating anal intraepithelial neoplasia (AIN) lacks a best practice. Current treatments reduce disease but have high recurrence rates, with vaccination showing promise for prevention and recurrence.
Area of Science:
- Oncology
- Preventive Medicine
- Virology
Background:
- Anal intraepithelial neoplasia (AIN) is a precursor to invasive anal cancer.
- Optimal management strategies for AIN are still under investigation.
- Screening efforts for AIN have produced variable outcomes.
Purpose of the Study:
- To review current treatment modalities for AIN.
- To consider emerging evidence in AIN management.
- To highlight the need for defined best practices in AIN care.
Main Methods:
- Literature review of existing studies on AIN treatments.
- Analysis of pharmacotherapeutic and surgical options.
- Evaluation of preventive strategies, including vaccination.
Main Results:
- Pharmacotherapeutic and surgical treatments can reduce AIN burden but often result in recurrence.
- No current treatment offers a durable response for severe AIN.
- Vaccination may reduce AIN incidence and recurrence.
- Multimodal approaches show potential for AIN control.
Conclusions:
- AIN management requires a comprehensive approach, considering evolving evidence.
- Vaccination represents a promising strategy for primary prevention and managing recurrent AIN.
- Further research, including the ANCHOR study, is crucial for defining optimal AIN treatment pathways, especially in high-risk populations.
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