New Strategies to Assess Anal Cancer Risk In Women

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

143 participants

Study Classification

OBSERVATIONAL

Study Start Date

2016-07-31

Study Completion Date

2017-02-27

Brief Summary

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The purpose of this research is to study different strategies to identify women at highest risk for anal cancer. Primarily, investigators want to study a risk assessment called the Anal Cancer Risk Index; it gives women an overall number score based on risk factors that they may have for anal cancer, such as age, number of sexual partners, or smoking. Investigators seek to understand whether women with higher Anal Cancer Risk Index scores are more likely to have abnormal results on anal pap smears, HPV tests, or anal biopsies. The study team will collect swabs of the cervix and the anus to study different laboratory tests that could identify women at highest risk of cervical and anal cancer. These laboratory tests include an anal pap smear, tests for markers of disease and tests that detect the HPV types most likely to cause cancer. The study team would like to see which of these laboratory tests do the best job at predicting precancerous lesions in the anus and are better indicators of risk for cancer. After collecting these swabs, women will have a procedure called high resolution anoscopy where investigators look closely at the anus and biopsy any suspicious areas. Finally, the study team will look for HPV proteins and changes that HPV can make in cells to see if these tests predict anal lesions.

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Detailed Description

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Investigators seek to study different strategies to identify women at highest risk for anal cancer. Primarily, investigators want to study a risk assessment called the Anal Cancer Risk Index; it gives women an overall number score based on risk factors that they may have for anal cancer, such as age, number of sexual partners, or smoking. The study team would like to determine whether women with higher Anal Cancer Risk Index scores are more likely to have abnormal results on anal pap smears, HPV tests, or anal biopsies. Next, the team will collect a swab of the cervix and swabs of the anus to study different laboratory tests that could identify women at highest risk of anal cancer: these tests include an anal pap smear and tests that detect HPV types most likely to cause cancer. Investigators would like to see which of these laboratory tests do the best job at predicting precancerous lesions in the anus. After collecting these swabs, women will have a procedure called high resolution anoscopy where investigators will look closely at the anus and biopsy any suspicious areas. Finally, the study team will look for HPV proteins and changes that HPV can make in cells to see if these tests predict anal lesions. The HPV protein is called E6 and E7 and the cell change test is called CADM1/MAL/miR-124-2. Investigators will measure E6/E7 and CADM1/MAL/miR-124-2 in cervical and anal samples to see if women positive for this marker are more likely to have abnormal results on anal pap smears or anal biopsies.

Conditions

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Human Immunodeficiency Virus (HIV) Human Papillomavirus (HPV)

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Validation Study

Participants will undergo a perianal and digital anorectal exam, a high resolution anoscopy, and cervical and anal swabs to determine the best method to identify women at high risk for anal cancer.

Perianal and Digital Anorectal Exam

Intervention Type PROCEDURE

The physician will inspect the outside of the anus and use a gloved finger to feel the anus for any masses.

Cervical Swabs

Intervention Type PROCEDURE

A speculum will be inserted into the vagina to visualize the cervix. The sample for research tests will be collected with one ThinPrep cytobroom inserted into the cervix. Collection will be same for the sample to be paced in the RNA storage solution for future biomarker studies.

Anal Swabs

Intervention Type PROCEDURE

The anal cytology specimen will be collected by inserting a saline moistened cotton-tipped swab into the anus, rotating it clock-wise for 20 seconds, and placed in SurePath. The first twenty participants will have anal cells collected in two different ways for validation/optimization: 1) saline moistened Dacron swab placed directly in ThinPrep medium and 2) Medscand Cytobrush Plus, a special brush, placed directly into ThinPrep medium. After validation/optimization is complete for up to 20 participants, the best collection method will be selected and will be used for all future enrolled participants.

High Resolution Anoscopy (HRA)

Intervention Type PROCEDURE

High Resolution Anoscopy is a procedure that allows for examination and evaluation of the anal canal. Using a small thin round tube called an anoscope, the anal canal is examined with a high resolution magnifying instrument called a colposcope. Application of a mild acidic liquid (acetic acid or diluted vinegar) or a brown iodine-based solution (Lugol's) onto the anal canal facilitates evaluation of abnormal tissue such as anal dysplasia. If abnormal staining is seen using acetic acid (dense white lesion) or Lugol's solution (bright yellow lesion) a biopsy of that area will be obtained.

Interventions

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Perianal and Digital Anorectal Exam

The physician will inspect the outside of the anus and use a gloved finger to feel the anus for any masses.

Intervention Type PROCEDURE

Cervical Swabs

A speculum will be inserted into the vagina to visualize the cervix. The sample for research tests will be collected with one ThinPrep cytobroom inserted into the cervix. Collection will be same for the sample to be paced in the RNA storage solution for future biomarker studies.

Intervention Type PROCEDURE

Anal Swabs

The anal cytology specimen will be collected by inserting a saline moistened cotton-tipped swab into the anus, rotating it clock-wise for 20 seconds, and placed in SurePath. The first twenty participants will have anal cells collected in two different ways for validation/optimization: 1) saline moistened Dacron swab placed directly in ThinPrep medium and 2) Medscand Cytobrush Plus, a special brush, placed directly into ThinPrep medium. After validation/optimization is complete for up to 20 participants, the best collection method will be selected and will be used for all future enrolled participants.

Intervention Type PROCEDURE

High Resolution Anoscopy (HRA)

High Resolution Anoscopy is a procedure that allows for examination and evaluation of the anal canal. Using a small thin round tube called an anoscope, the anal canal is examined with a high resolution magnifying instrument called a colposcope. Application of a mild acidic liquid (acetic acid or diluted vinegar) or a brown iodine-based solution (Lugol's) onto the anal canal facilitates evaluation of abnormal tissue such as anal dysplasia. If abnormal staining is seen using acetic acid (dense white lesion) or Lugol's solution (bright yellow lesion) a biopsy of that area will be obtained.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Currently enrolled in the Women's HIV Interagency Study (WIHS) study
* Able and willing to undergo anal cytology, anal molecular testing, and high resolution anoscopy with targeted anal biopsies

Exclusion Criteria

* History of high grade anal intraepithelial neoplasia (AIN 2 or 3)
* History of active anal disease requiring surgery
* History of anal or cervical cancer

Minimum Eligible Age

18 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No