Diphencyprone cream in the treatment of melanoma metastases of

Norfolk & Norwich Skin Tumour Unit
Dermatology Department
Diphencyprone cream in the treatment of melanoma metastases
of the skin
What is Diphencyprone (DPCP)?
Diphencyprone (DPCP) is a chemical which causes the body to react by stimulating the body’s
immune system. It is used as a cream which is applied to the skin.
When is Diphencyprone used?
DPCP is used when a melanoma has spread to the skin. It works best when the metastases in the
skin are small and near the surface of the skin. It helps to prevent the melanoma from spreading
and it can cause skin metastases to disappear.
What does using Diphencyprone involve?
You will be reviewed in clinic by the Consultant Dermatologist and if DPCP is the right treatment
for you we will:
 Make you allergic to DPCP by applying a small amount at high concentration (2% DPCP in
acetone) to your skin as a patch test.
 We apply it to your upper inner arm and cover
 This remains undisturbed for 2 days – you mustn’t wash the area during this time.
 You should get an angry reaction which is red, raised and itchy approximately 2-5 days
after the patch test has been applied. This means you have become allergic to the DPCP.
 We will contact you to evaluate the response by phone or see you in person in the clinic.
If it is a ‘good’ response we will arrange for treatment to commence.
Application of Diphencyprone:
10-14 days after we have made you allergic to DPCP, you will start DPCP in aqueous
cream. The strength will be much weaker than that applied in the patch test.
You will be shown how to apply the DPCP cream to your skin by the doctor or nurse in the
clinic. Gloves should be worn for this process and disposed of safely. (Gloves & disposal
bag will be supplied)
Wash the DPCP cream off after 10-12 hours using warm soapy water.
You should develop an eczema like reaction 2-4 days after application.
Everybody reacts differently to the cream so the strength may need to be increased or
reduced depending on how you respond. We are aiming for an eczematous reaction which
you can cope with.
Development of an eczematous reaction is needed for the treatment to work.
The DPCP cream is applied once weekly to affected area as shown by doctor or nurse.
Authors: Dr Jennifer Garioch and Sara Wilkinson Skin Cancer CNS
Review date: April 2018
Page 1 of 2
Skin reaction:
Red rash, occasionally mild blistering is to be expected.
Adverse reaction: extreme red rash, itching, extensive severe blistering and weeping are of
concern. If in doubt please contact us (details below).
If a severe reaction occurs STOP the treatment until you have contacted us. We will then
advise on further management.
Follow up:
Initially follow up may be by telephone or e mail to assess reaction to the patch test and the
initial dose of DPCP cream.
Regular follow up is 1-2 monthly but may be changed if there are any worries or concerns,
or at the discretion of the Consultant.
Your GP will be informed of all treatment plans.
Long term effect:
The DPCP cream needs to be continued regularly in order to maintain the body’s immune
reaction against the melanoma cells in the skin. This cream may be used indefinitely.
A ‘blue ink’ effect may appear in the skin following regular treatment and looks like a tattoo.
This is nothing to be concerned about. It indicates that the body’s immune cells are fighting
the melanoma cells. The blue colour is caused by melanin within cells of the immune
Contact details:
Consultant Secretary: 01603 288210
Specialist Nurse: 01603 288365
Repeat prescriptions: 01603 288210 or 01603 288365
This Trust is a member of Intran. Intran is a 24hour interpretation and translation service for
patients. Services include: telephone access to foreign language trained interpreters, British Sign Language, Lip
Speakers for the Deaf and Braille translations.
Authors: Dr Jennifer Garioch and Sara Wilkinson Skin Cancer CNS
Review date: April 2018
Page 2 of 2
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