search
Back to results

CSP #562 - The VA Keratinocyte Carcinoma Chemoprevention Trial (VAKCCT)

Primary Purpose

Carcinoma, Basal Cell, Carcinoma, Squamous Cell, Skin Neoplasms

Status
Completed
Phase
Phase 4
Locations
United States
Study Type
Interventional
Intervention
5-fluorouracil
Placebo, vehicle control
Sponsored by
VA Office of Research and Development
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Carcinoma, Basal Cell focused on measuring NMSC, nonmelanoma skin cancer, topical 5-FU 5% cream, Neoplasms, Antineoplastic Agents, Therapeutic Uses, Dermatologic Agents, Neoplasms by Site, carcinoma, basal cell, carcinoma, squamous cell

Eligibility Criteria

undefined - undefined (Child, Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  • Veteran who is at high risk for developing skin cancer defined as 2 keratinocyte carcinomas in the past 5 years, at least one of which was located on the face or ears

Exclusion Criteria:

  • Participants who are unable to speak English
  • Participants with KC at randomization
  • Participants currently using or having used field therapy for AKs on the face or ears in the past 3 years. The vast majority of these field treatments would have been with 5-FU cream. The investigators will allow recent use of therapies that are applied to individual AK lesions (e.g. cryotherapy), but not those that were used on an entire area (field) in the study treatment area Participants currently using or having used systemic 5-fluorouracil or oral capecitabine (Xeloda) within the past 3 years Participants with known allergy to sunscreen, triamcinolone and/or 5-fluorouracil.

Exclusions 6-l0: The investigators will exclude the small proportion who get their KCs for special reasons other than ultraviolet radiation exposure (see list below), since that etiologic difference, which is associated with a prognostic difference, could be associated with a biologic difference in response to chemoprevention efforts. These will include:

  • Solid organ transplant recipients, such as renal, hepatic, or cardiac transplant patients
  • Individuals with genetic disorders associated with very high cancer risk such as:
  • basal cell nevus syndrome
  • erythrodysplasia verruciformis
  • xeroderma pigmentosum
  • Arsenic exposure
  • PUVA (Psoralen plus UVA) treatment
  • Cutaneous T-cell lymphoma
  • Prior or current radiation therapy to the face and/or ears.

Additional exclusions (12-15) are:

  • Those who, in the opinion of the recruiting investigator, have very high mortality risk at randomization (less than 50% chance of surviving 4 years) due to co morbid illness such as metastatic cancer or COPD.
  • For women of childbearing potential an initial pregnancy test and ongoing birth control will be required for participation.
  • Patients with known dihydropyrimidine dehydrogenase (DPD) enzyme deficiency by self report or noted in the medical record (they have increased toxicity from systemic 5-FU, although screening for this is not part of dermatologic practice and will not be part of this study).
  • Patients on methotrexate (these will constitute about 1% of potentially eligible individuals) because they may have more severe reactions to topical 5-FU.

Sites / Locations

  • VA Palo Alto Health Care System, Palo Alto, CA
  • VA San Diego Healthcare System, San Diego, CA
  • VA Eastern Colorado Health Care System, Denver, CO
  • Bay Pines VA Healthcare System, Pay Pines, FL
  • Miami VA Healthcare System, Miami, FL
  • Atlanta VA Medical and Rehab Center, Decatur, GA
  • Edward Hines Jr. VA Hospital, Hines, IL
  • VA Boston Healthcare System Jamaica Plain Campus, Jamaica Plain, MA
  • Minneapolis VA Health Care System, Minneapolis, MN
  • Durham VA Medical Center, Durham, NC
  • Philadelphia VA Medical Center, Philadelphia, PA
  • Providence VA Medical Center, Providence, RI
  • Tennessee Valley Healthcare System Nashville Campus, Nashville, TN

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Placebo Comparator

Arm Label

Arm 1: 5-fluorouracil

Arm 2: Placebo

Arm Description

Group assigned to blinded 5-FU (5-fluorouracil) cream applied to face and ears twice daily for maximum of 56 doses

Group assigned to blinded placebo, vehicle control cream applied to face and ears twice daily for maximum of 56 doses

Outcomes

Primary Outcome Measures

The Time to Diagnosis of the First Keratinocyte Carcinoma (KC) on the Face or Ears for Which Surgery is Performed
Diagnosis of the first Primary Basil Cell Carcinoma (BCC) or primary Squamous Cell Carcinoma (SCC) on the face or ears that was removed surgically.
Hazard Ratio for Surgically Treated KC

Secondary Outcome Measures

Full Information

First Posted
February 18, 2009
Last Updated
May 18, 2021
Sponsor
VA Office of Research and Development
search

1. Study Identification

Unique Protocol Identification Number
NCT00847912
Brief Title
CSP #562 - The VA Keratinocyte Carcinoma Chemoprevention Trial
Acronym
VAKCCT
Official Title
CSP #562 - The VA Keratinocyte Carcinoma Chemoprevention Trial
Study Type
Interventional

2. Study Status

Record Verification Date
May 2021
Overall Recruitment Status
Completed
Study Start Date
June 26, 2009 (Actual)
Primary Completion Date
June 28, 2013 (Actual)
Study Completion Date
July 30, 2016 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
VA Office of Research and Development

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Product Manufactured in and Exported from the U.S.
No
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
The main purpose of this study is to see if 5-fluorouracil (5-FU) skin cream can prevent the growth of new skin cancers on the face and ears. The cost of trying to prevent skin cancer will be compared to the usual cost of treating skin cancer. Participants are being asked to be a part of this study because the participants have been treated for two or more skin cancers within the past five (5) years. At least one of these cancers occurred on the face or ears. Having had two or more skins cancers in the past 5 years makes it likely that participants will develop additional skin cancers in the future. Exposure to ultraviolet radiation from the sun or artificial sources such as tanning beds is a major cause of basal cell and squamous cell carcinoma of the skin. Using lotions, creams, or gels that contain sunscreens can help protect the skin from premature aging and damage that may lead to skin cancer. The 5-FU skin cream used in this study is FDA-approved to treat some types of skin cancers and spots that might become skin cancer. However, 5-FU skin cream has never been studied to see if it can prevent skin cancer. This drug is not approved by the FDA for how it will be used in this study. In this study, one half of the patients will use the 5-FU cream and the other half will use a skin cream that looks identical to the 5-FU cream but does not have 5-FU or any other active drug in it. Approximately twelve VA medical centers will work together in this study. About one thousand (1000) patients will be in this study. The study is sponsored by the U.S. Department of Veterans Affairs Cooperative Studies Program.
Detailed Description
Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) of the skin, both of which are keratinocyte carcinomas (KCs), account for a half of all cancers in the United States, and over 100,000 diagnoses per year in the VA. The standard treatment for these KCs is excision of the lesion, and they cost the US health care system some $2.5 billion annually and about $100 million annually in the VA. There is no proven means to prevent KCs (except perhaps for a modest benefit of intensive daily sunscreen use). An effective prevention strategy would dramatically change the way high-risk patients are managed and could substantially reduce the costs of care. The investigators' preliminary analysis indicates that the savings will be $116 per high-risk patient and will account for a total national savings of over $11 million. These findings imply that the study would pay for itself by the end of 4 years. The investigators hypothesize that topical 5-fluorouracil (5-FU) chemoprevention will prevent skin cancer surgeries and will be cost-saving. To test this the investigators propose a randomized controlled trial of 5-FU compared to a vehicle control to the face and ears in a high-risk population. In the study, 1000 Veterans at high-risk of skin cancer defined as at least 2 KCs in the prior 5 years, at least one of which was on the face or ears, will be randomized to 5-FU or a vehicle control cream, and followed for 2 to 4 years. The primary endpoint will be surgery for any KC on the face and ears. The investigators will also assess the cost of care, quality of life, the side effects associated with treatment, and the prevalence and number of actinic keratoses, a skin cancer precursor and itself a cause of morbidity and cost. By targeting patients at high-risk, the study focuses on high-cost patients for whom this treatment could both improve outcomes (cancers and quality of life) and reduce costs.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Carcinoma, Basal Cell, Carcinoma, Squamous Cell, Skin Neoplasms, Skin Diseases, Neoplasms, Basal Cell, Neoplasms, Squamous Cell, Carcinoma
Keywords
NMSC, nonmelanoma skin cancer, topical 5-FU 5% cream, Neoplasms, Antineoplastic Agents, Therapeutic Uses, Dermatologic Agents, Neoplasms by Site, carcinoma, basal cell, carcinoma, squamous cell

7. Study Design

Primary Purpose
Prevention
Study Phase
Phase 4
Interventional Study Model
Parallel Assignment
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Allocation
Randomized
Enrollment
954 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Arm 1: 5-fluorouracil
Arm Type
Experimental
Arm Description
Group assigned to blinded 5-FU (5-fluorouracil) cream applied to face and ears twice daily for maximum of 56 doses
Arm Title
Arm 2: Placebo
Arm Type
Placebo Comparator
Arm Description
Group assigned to blinded placebo, vehicle control cream applied to face and ears twice daily for maximum of 56 doses
Intervention Type
Drug
Intervention Name(s)
5-fluorouracil
Other Intervention Name(s)
Efudex, 5-FU
Intervention Description
Apply thin layer of topical 5-FU 5% cream twice daily to face and ears for 4 weeks. Treatment to be initiated immediately after randomization. If unable to tolerate the twice daily 5-FU, they will discontinue the treatment and initiate "cool-down" treatment with triamcinolone 0.1% cream twice daily until the symptoms resolve. At 3 weeks after stopping 5-FU, if and only if the participant has not received at least the minimum 2 week (28 dose) course, 5-FU treatment will be resumed on a once-daily basis to complete the 56 dose course. If this is not tolerated, the "cool-down" routine will be followed, but 5-FU will be stopped.
Intervention Type
Drug
Intervention Name(s)
Placebo, vehicle control
Other Intervention Name(s)
Placebo
Intervention Description
Apply thin layer of vehicle control cream twice daily to face and ears for 4 weeks. Treatment to be initiated immediately after randomization. If unable to tolerate the twice daily vehicle control cream, they will discontinue the treatment and initiate "cool-down" treatment with triamcinolone 0.1% cream twice daily until the symptoms resolve. At 3 weeks after stopping vehicle control cream, if and only if the participant has not received at least the minimum 2 week (28 dose) course, vehicle control cream treatment will be resumed on a once-daily basis to complete the 56 dose course. If this is not tolerated, the "cool-down" routine will be followed, but vehicle control cream will be stopped.
Primary Outcome Measure Information:
Title
The Time to Diagnosis of the First Keratinocyte Carcinoma (KC) on the Face or Ears for Which Surgery is Performed
Description
Diagnosis of the first Primary Basil Cell Carcinoma (BCC) or primary Squamous Cell Carcinoma (SCC) on the face or ears that was removed surgically.
Time Frame
From randomization to last visit prior to end of study date (6/30/2013), assessed up to four years
Title
Hazard Ratio for Surgically Treated KC
Time Frame
date of randomization to last visit before end of study follow up (6/30/2013), assessed up to four years

10. Eligibility

Sex
All
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Veteran who is at high risk for developing skin cancer defined as 2 keratinocyte carcinomas in the past 5 years, at least one of which was located on the face or ears Exclusion Criteria: Participants who are unable to speak English Participants with KC at randomization Participants currently using or having used field therapy for AKs on the face or ears in the past 3 years. The vast majority of these field treatments would have been with 5-FU cream. The investigators will allow recent use of therapies that are applied to individual AK lesions (e.g. cryotherapy), but not those that were used on an entire area (field) in the study treatment area Participants currently using or having used systemic 5-fluorouracil or oral capecitabine (Xeloda) within the past 3 years Participants with known allergy to sunscreen, triamcinolone and/or 5-fluorouracil. Exclusions 6-l0: The investigators will exclude the small proportion who get their KCs for special reasons other than ultraviolet radiation exposure (see list below), since that etiologic difference, which is associated with a prognostic difference, could be associated with a biologic difference in response to chemoprevention efforts. These will include: Solid organ transplant recipients, such as renal, hepatic, or cardiac transplant patients Individuals with genetic disorders associated with very high cancer risk such as: basal cell nevus syndrome erythrodysplasia verruciformis xeroderma pigmentosum Arsenic exposure PUVA (Psoralen plus UVA) treatment Cutaneous T-cell lymphoma Prior or current radiation therapy to the face and/or ears. Additional exclusions (12-15) are: Those who, in the opinion of the recruiting investigator, have very high mortality risk at randomization (less than 50% chance of surviving 4 years) due to co morbid illness such as metastatic cancer or COPD. For women of childbearing potential an initial pregnancy test and ongoing birth control will be required for participation. Patients with known dihydropyrimidine dehydrogenase (DPD) enzyme deficiency by self report or noted in the medical record (they have increased toxicity from systemic 5-FU, although screening for this is not part of dermatologic practice and will not be part of this study). Patients on methotrexate (these will constitute about 1% of potentially eligible individuals) because they may have more severe reactions to topical 5-FU.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Martin A. Weinstock, MD
Organizational Affiliation
Providence VA Medical Center, Providence, RI
Official's Role
Study Chair
Facility Information:
Facility Name
VA Palo Alto Health Care System, Palo Alto, CA
City
Palo Alto
State/Province
California
ZIP/Postal Code
94304-1290
Country
United States
Facility Name
VA San Diego Healthcare System, San Diego, CA
City
San Diego
State/Province
California
ZIP/Postal Code
92161
Country
United States
Facility Name
VA Eastern Colorado Health Care System, Denver, CO
City
Denver
State/Province
Colorado
ZIP/Postal Code
80220
Country
United States
Facility Name
Bay Pines VA Healthcare System, Pay Pines, FL
City
Bay Pines
State/Province
Florida
ZIP/Postal Code
33744
Country
United States
Facility Name
Miami VA Healthcare System, Miami, FL
City
Miami
State/Province
Florida
ZIP/Postal Code
33125
Country
United States
Facility Name
Atlanta VA Medical and Rehab Center, Decatur, GA
City
Decatur
State/Province
Georgia
ZIP/Postal Code
30033
Country
United States
Facility Name
Edward Hines Jr. VA Hospital, Hines, IL
City
Hines
State/Province
Illinois
ZIP/Postal Code
60141-5000
Country
United States
Facility Name
VA Boston Healthcare System Jamaica Plain Campus, Jamaica Plain, MA
City
Boston
State/Province
Massachusetts
ZIP/Postal Code
02130
Country
United States
Facility Name
Minneapolis VA Health Care System, Minneapolis, MN
City
Minneapolis
State/Province
Minnesota
ZIP/Postal Code
55417
Country
United States
Facility Name
Durham VA Medical Center, Durham, NC
City
Durham
State/Province
North Carolina
ZIP/Postal Code
27705
Country
United States
Facility Name
Philadelphia VA Medical Center, Philadelphia, PA
City
Philadelphia
State/Province
Pennsylvania
ZIP/Postal Code
19104
Country
United States
Facility Name
Providence VA Medical Center, Providence, RI
City
Providence
State/Province
Rhode Island
ZIP/Postal Code
02908
Country
United States
Facility Name
Tennessee Valley Healthcare System Nashville Campus, Nashville, TN
City
Nashville
State/Province
Tennessee
ZIP/Postal Code
37212-2637
Country
United States

12. IPD Sharing Statement

Plan to Share IPD
No
Citations:
PubMed Identifier
24102420
Citation
Lee KC, Lew R, Weinstock MA. Improvement in precision of counting actinic keratoses. Br J Dermatol. 2014 Jan;170(1):188-91. doi: 10.1111/bjd.12629.
Results Reference
background
PubMed Identifier
25008439
Citation
Korgavkar K, Firoz EF, Xiong M, Lew R, Marcolivio K, Burnside N, Dyer R, Weinstock MA; VAKCC Trial Group. Measuring the severity of topical 5-fluorouracil toxicity. J Cutan Med Surg. 2014 Jul-Aug;18(4):229-35. doi: 10.2310/7750.2013.13143.
Results Reference
background
PubMed Identifier
25950503
Citation
Pomerantz H, Hogan D, Eilers D, Swetter SM, Chen SC, Jacob SE, Warshaw EM, Stricklin G, Dellavalle RP, Sidhu-Malik N, Konnikov N, Werth VP, Keri J, Lew R, Weinstock MA; Veterans Affairs Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial Group. Long-term Efficacy of Topical Fluorouracil Cream, 5%, for Treating Actinic Keratosis: A Randomized Clinical Trial. JAMA Dermatol. 2015 Sep;151(9):952-60. doi: 10.1001/jamadermatol.2015.0502.
Results Reference
background
PubMed Identifier
24033340
Citation
Chen SC, Hill ND, Veledar E, Swetter SM, Weinstock MA. Reliability of quantification measures of actinic keratosis. Br J Dermatol. 2013 Dec;169(6):1219-22. doi: 10.1111/bjd.12591.
Results Reference
background
PubMed Identifier
27207349
Citation
Pomerantz H, Korgavkar K, Lee KC, Lew R, Weinstock MA; VAKCC Trial Group. Validation of Photograph-Based Toxicity Score for Topical 5-Fluorouracil Cream Application. J Cutan Med Surg. 2016 Sep;20(5):458-66. doi: 10.1177/1203475416643952. Epub 2016 Apr 18.
Results Reference
result
PubMed Identifier
28088997
Citation
Siegel JA, Luber AJ, Weinstock MA; Department of Veterans Affairs Topical Tretinoin Chemoprevention Trial and Department of Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial Groups. Predictors of actinic keratosis count in patients with multiple keratinocyte carcinomas: A cross-sectional study. J Am Acad Dermatol. 2017 Feb;76(2):346-349. doi: 10.1016/j.jaad.2016.09.020. No abstract available.
Results Reference
result
PubMed Identifier
28532759
Citation
Walker JL, Siegel JA, Sachar M, Pomerantz H, Chen SC, Swetter SM, Dellavalle RP, Stricklin GP, Qureshi AA, DiGiovanna JJ, Weinstock MA. 5-Fluorouracil for Actinic Keratosis Treatment and Chemoprevention: A Randomized Controlled Trial. J Invest Dermatol. 2017 Jun;137(6):1367-1370. doi: 10.1016/j.jid.2016.12.029. No abstract available.
Results Reference
result
PubMed Identifier
28621489
Citation
Pomerantz H, Chren MM, Lew R, Weinstock MA; VA Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial Group*. Validation and comparison of quality-of-life measures for topical 5-fluorouracil treatment: results from a randomized controlled trial. Clin Exp Dermatol. 2017 Jul;42(5):488-495. doi: 10.1111/ced.13089.
Results Reference
result
PubMed Identifier
28500658
Citation
Korgavkar K, Weinstock MA, Lee KC; VAKCC Trial Group. Evaluation of photoaging scales in an elderly male population. J Eur Acad Dermatol Venereol. 2017 Nov;31(11):e489-e490. doi: 10.1111/jdv.14330. Epub 2017 Jun 20. No abstract available.
Results Reference
result
PubMed Identifier
29241779
Citation
Leader NF, Means AD, Robinson-Bostom L, Telang GH, Wilkel CS, Weinstock MA; Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial group. Interrater reliability for histopathologic diagnosis of keratinocyte carcinomas. J Am Acad Dermatol. 2018 Jan;78(1):185-187. doi: 10.1016/j.jaad.2017.07.024. No abstract available.
Results Reference
result
PubMed Identifier
28877312
Citation
Korgavkar K, Lee KC, Weinstock MA; Veterans Affairs Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial Group. Effect of Topical Fluorouracil Cream on Photodamage: Secondary Analysis of a Randomized Clinical Trial. JAMA Dermatol. 2017 Nov 1;153(11):1142-1146. doi: 10.1001/jamadermatol.2017.2578.
Results Reference
result
PubMed Identifier
30508548
Citation
Means AD, Lee KC, Korgavkar K, Swetter SM, Dellavalle RP, Chen S, Stricklin G, Weinstock MA; Veterans Affairs Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial Group. Development of a Pigmented Facial Lesion Scale Based on Darkness and Extent of Lesions in Older Veterans. J Invest Dermatol. 2019 May;139(5):1185-1187. doi: 10.1016/j.jid.2018.11.017. Epub 2018 Nov 30. No abstract available.
Results Reference
result
PubMed Identifier
30896781
Citation
Beatson M, Means AD, Leader NF, Robinson-Bostom L, Weinstock MA. Characteristics of Keratinocyte Carcinomas and Patients with Keratinocyte Carcinomas Following a Single 2-4 Week Course of Topical 5-fluorouracil on the Face and Ears. Acta Derm Venereol. 2019 Jun 1;99(7):707-708. doi: 10.2340/00015555-3176. No abstract available.
Results Reference
result
PubMed Identifier
31647464
Citation
Beatson M, Siegel JA, Chren MM, Weinstock MA. Effects of increased actinic keratosis count on skin-related quality of life: results from the Veterans Affairs Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial. Eur J Dermatol. 2019 Oct 1;29(5):507-510. doi: 10.1684/ejd.2019.3637.
Results Reference
result
PubMed Identifier
32880186
Citation
Beatson M, Misitzis A, Landow S, Yoon J, Higgins HW 2nd, Phibbs C, Weinstock MA. Predictors of Basal Cell Carcinoma and Implications for Follow-Up in High-Risk Patients in the Veterans Affairs Keratinocyte Carcinoma Chemoprevention (VAKCC) Trial. J Cutan Med Surg. 2021 Jan-Feb;25(1):102-103. doi: 10.1177/1203475420945230. Epub 2020 Sep 3. No abstract available.
Results Reference
result
PubMed Identifier
33047438
Citation
Misitzis A, Stratigos AJ, Beatson M, Mastorakos G, Dellavalle RP, Weinstock MA; Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial Group. The association of metformin use with keratinocyte carcinoma development in high-risk patients. Dermatol Ther. 2020 Nov;33(6):e14402. doi: 10.1111/dth.14402. Epub 2020 Oct 20.
Results Reference
result
PubMed Identifier
27543222
Citation
Siegel JA, Chren MM, Weinstock MA; Department of Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial Group. Correlates of skin-related quality of life (QoL) in those with multiple keratinocyte carcinomas (KCs): A cross-sectional study. J Am Acad Dermatol. 2016 Sep;75(3):639-642. doi: 10.1016/j.jaad.2016.05.008. No abstract available.
Results Reference
result
PubMed Identifier
27465252
Citation
Yoon J, Phibbs CS, Chow A, Pomerantz H, Weinstock MA. Costs of Keratinocyte Carcinoma (Nonmelanoma Skin Cancer) and Actinic Keratosis Treatment in the Veterans Health Administration. Dermatol Surg. 2016 Sep;42(9):1041-7. doi: 10.1097/DSS.0000000000000820.
Results Reference
result
PubMed Identifier
29299592
Citation
Weinstock MA, Thwin SS, Siegel JA, Marcolivio K, Means AD, Leader NF, Shaw FM, Hogan D, Eilers D, Swetter SM, Chen SC, Jacob SE, Warshaw EM, Stricklin GP, Dellavalle RP, Sidhu-Malik N, Konnikov N, Werth VP, Keri JE, Robinson-Bostom L, Ringer RJ, Lew RA, Ferguson R, DiGiovanna JJ, Huang GD; Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial (VAKCC) Group. Chemoprevention of Basal and Squamous Cell Carcinoma With a Single Course of Fluorouracil, 5%, Cream: A Randomized Clinical Trial. JAMA Dermatol. 2018 Feb 1;154(2):167-174. doi: 10.1001/jamadermatol.2017.3631.
Results Reference
derived

Learn more about this trial

CSP #562 - The VA Keratinocyte Carcinoma Chemoprevention Trial

We'll reach out to this number within 24 hrs