COVID-19 studies are our top priority. For all other trials, there is a 4-week delay in processing a trial submitted to the ANZCTR and additional delays for updates of registered trials. We appreciate your patience.

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been endorsed by the ANZCTR. Before participating in a study, talk to your health care provider and refer to this information for consumers
Trial details imported from

For full trial details, please see the original record at

Registration number
Ethics application status
Date submitted
Date registered
Date last updated

Titles & IDs
Public title
Radiotherapy or Imiquimod in Complex Lentigo Maligna
Scientific title
A Randomised Controlled Multicentre Trial of Imiquimod Versus Radiotherapy for Lentigo Maligna (LM) When Staged Surgical Excision With 5mm Margins is Not Possible, is Refused, or Fails
Secondary ID [1] 0 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Lentigo Maligna 0 0
Condition category
Condition code
Cancer 0 0 0 0
Neuroendocrine tumour (NET)
Skin 0 0 0 0
Other skin conditions

Study type
Description of intervention(s) / exposure
Treatment: Drugs - Imiquimod
Treatment: Other - Radiotherapy

Experimental: Imiquimod - Topical imiquimod 5% cream
application to treatment area for 5 days/week for a total of 12 weeks
dispensed at baseline visit along with patient diary

Experimental: Radiotherapy - Radiotherapy
treatment regimen determined by treating radiation oncologist and as per standard practice at local institution
treatment to commence within 8 weeks of randomisation

Treatment: Drugs: Imiquimod

Treatment: Other: Radiotherapy

Intervention code [1] 0 0
Treatment: Drugs
Intervention code [2] 0 0
Treatment: Other
Comparator / control treatment
Control group

Primary outcome [1] 0 0
Proportion of patients experiencing LM treatment failure (as determined by systematic biopsy) 6 months following completion of treatment.
Timepoint [1] 0 0
6 months
Secondary outcome [1] 0 0
LM treatment failure at 12 months and 24 months after the completion of treatment.
Timepoint [1] 0 0
12 and 24 months
Secondary outcome [2] 0 0
Quality of life using Skindex questionnaire
Timepoint [2] 0 0
0-24 months
Secondary outcome [3] 0 0
Cosmetic outcome 24 months after treatment or at treatment failure - Evaluated using photographs taken of LM lesion(s) during the study
Timepoint [3] 0 0
24 months
Secondary outcome [4] 0 0
Incidence of invasive melanoma within treatment fields; a sub-study to evaluate the utility of reflectance confocal microscopy (RCM) compared with standard biopsy in diagnosing recurrence
Timepoint [4] 0 0
0-24 months

Key inclusion criteria
1. Aged 18 years or older.

2. A biopsy-proven LM. This includes previous treatment failures (not with imiquimod or
RT) of LM that are diagnosed as biopsy-proven LM.

3. LM that is in a location amenable to treatment with imiquimod and radiotherapy.

4. Willing and able to comply with study requirements.

5. Written informed consent.
Minimum age
18 Years
Maximum age
120 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
1. Invasive melanoma.

2. Medical or psychiatric condition that compromises the ability of the patient to
complete protocol treatment or follow-up assessments.

3. Patients who are pregnant or lactating. Women of child bearing potential must have a
confirmed negative urine pregnancy test at study entry.

4. Life expectancy of less than 2 years.

5. Radiotherapy sensitivity syndrome

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?

Intervention assignment
Other design features
Phase 3
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)
Recruitment hospital [1] 0 0
Calvary Mater Newcastle - Newcastle
Recruitment hospital [2] 0 0
Melanoma Institute Australia - North Sydney
Recruitment hospital [3] 0 0
Skin and Cancer Foundation - Sydney
Recruitment hospital [4] 0 0
Westmead Hospital - Sydney
Recruitment hospital [5] 0 0
St Vincent's Hospital, Sydney - Sydney
Recruitment hospital [6] 0 0
Princess Alexandra Hospital - Brisbane
Recruitment hospital [7] 0 0
Royal Adelaide Hospital - Adelaide
Recruitment hospital [8] 0 0
The Alfred Hospital - Melbourne
Recruitment postcode(s) [1] 0 0
2298 - Newcastle
Recruitment postcode(s) [2] 0 0
2060 - North Sydney
Recruitment postcode(s) [3] 0 0
2010 - Sydney
Recruitment postcode(s) [4] 0 0
2145 - Sydney
Recruitment postcode(s) [5] 0 0
- Sydney
Recruitment postcode(s) [6] 0 0
4102 - Brisbane
Recruitment postcode(s) [7] 0 0
5000 - Adelaide
Recruitment postcode(s) [8] 0 0
3004 - Melbourne
Recruitment outside Australia
Country [1] 0 0
State/province [1] 0 0
São Paulo
Country [2] 0 0
New Zealand
State/province [2] 0 0

Funding & Sponsors
Primary sponsor type
Melanoma and Skin Cancer Trials Limited
Other collaborator category [1] 0 0
Name [1] 0 0
Melanoma Institute Australia
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Brief summary
The purpose of this study is to investigate the effectiveness of using either radiotherapy
(RT) or Imiquimod (ImiQ) to treat the Lentigo Maligna (LM), when surgery is not possible, is
refused, or fails.

Surgery is the standard treatment for people diagnosed with LM. However for some people, it
may not be possible due to the location of their LM lesion(s).

Currently, the Australian and New Zealand Melanoma Treatment Guidelines recommend
radiotherapy for the treatment of LM however there is no clinical trial evidence for this and
a trial is needed to prove which treatment is safer and more effective. Some clinicians may
also recommend the use of a cream called Imiquimod. It is approved and widely used in
Australia to treat solar keratosis, superficial basal cell carcinoma, external genital warts,
and perianal warts. Although not currently licensed for treatment use in LM, there is some
evidence to suggest that it is both safe and effective in treating LM.

This trial will scientifically evaluate and compare these two treatments in a controlled
clinical setting.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 0 0
Pascale Guitera
Address 0 0
Melanoma Institute Australia
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
MASC Coordinator
Address 0 0
Country 0 0
Phone 0 0
612 9911 7352
Fax 0 0
Email 0 0
Contact person for scientific queries

Summary results
For IPD and results data, please see