High-resolution anoscopy: Unchartered territory for gastroenterologists?

Area of Science:

• Gastroenterology
• Oncology
• Colposcopy

Background:

• Anal cancer screening is vital for high-risk populations, including men who have sex with men, HIV-infected individuals, and transplant recipients.
• Abnormal anal cytology necessitates further investigation to detect precancerous anal lesions.
• Current screening methods may not adequately identify all suspicious lesions, highlighting a need for improved diagnostic tools.

Purpose of the Study:

• To describe the utility of high-resolution anoscopy (HRA) in the detection and management of anal high-grade lesions.
• To emphasize HRA's role in anal cancer prevention, mirroring cervical cancer screening protocols.
• To address the challenges and requirements for implementing HRA effectively.

Main Methods:

• High-resolution anoscopy (HRA) involves anal and perianal visualization under magnification using an anoscope and colposcope.
• Systematic examination of the squamocolumnar junction, transformation zone, and perianal skin is performed.
• Application of acetic acid and Lugol's iodine solutions aids in lesion identification and characterization, followed by biopsy of suspicious areas.

Main Results:

• HRA allows for superior detection of anal high-grade lesions compared to standard methods.
• Identified high-grade lesions can be treated (ablated) during the HRA procedure.
• The procedure enables precise characterization of lesions for targeted management.

Conclusions:

• High-resolution anoscopy (HRA) is an effective tool for anal cancer screening and prevention in at-risk individuals.
• Despite its efficacy, HRA presents a steep learning curve and requires specialized equipment and multidisciplinary care.
• Increased awareness and training are needed for gastroenterologists to adopt HRA widely.