https://www.gosh.nhs.uk/conditions-and-treatments/conditions-we-treat/intermediate-junctional-epidermolysis-bullosa/
Intermediate junctional epidermolysis bullosa (EB)
What is intermediate junctional EB?
EB is the name for a group of rare inherited skin disorders that cause the skin to become very fragile and blister at the slightest knock or bump. Intermediate junctional EB is a specific type of EB.
What causes intermediate junctional EB?
Intermediate junctional EB is a genetic condition. It is caused by faulty genes (gene mutations) in:
- LAMA3, LAMB3 and LAMC2 genes. These genes provide instructions for making laminin 332, which is a protein that helps to hold the skin layers together.
- COL17A gene. This gene produces type XVII collagen.
Mutations in these genes means that they will produce a reduced amount of protein. This results in fragile skin cells that can’t withstand normal knocks and bumps and leads to blisters and skin loss.
Type XVII collagen is present in the skin, but also in the lining of the mouth, the surface of the eye, upper oesophagus (swallowing tube) and lining of the bladder. These organs can therefore be affected in individuals with junctional EB.
Intermediate junctional EB is recessively inherited- this means the faulty gene has come from both parents who are just ‘carriers’ but don’t have EB themselves. On rare occasions the change to the gene can also happen by chance when neither parent is affected. This is called a ‘de novo mutation.’
How is intermediate junctional EB diagnosed?
EB is diagnosed by taking a tiny sample of skin (a skin biopsy) and examining it under a microscope.
Blood samples are also taken from the baby and parents to look for the specific gene changes.
What are the complications of intermediate junctional EB?
The main longer-term problems include:
- skin fragility leading to continual blistering and wounds
- damage to the eyes
- damage to the teeth from malformed tooth enamel
- extra nutritional needs
- thickened finger and toenails
- hair loss (alopecia) common in older children and adults.
Wounds may remain a lifelong problem, and areas of previous wounding can become permanently damaged and scarred.
Is there a cure for intermediate junctional EB?
There's currently no cure for intermediate junctional EB. Treatment aims to relieve symptoms and prevent complications developing, such as infection.
How does intermediate junctional EB affect life expectancy?
The majority of those affected survive to adulthood and some into old age. However, symptoms can be severe in newborn babies, and a lot of supportive care is required.
If I have another child, will they also have intermediate junctional EB?
This will vary and depend on whether you and your partner are carriers of the faulty gene.
If both parents are carriers, there is a 25% chance with each pregnancy that your child will be affected.
You may be offered a referral to a genetic specialist for counselling and tests if you or your partner are known to be a carrier of the faulty gene.
How to manage intermediate junctional EB
It’s important to pop blisters to stop them from getting bigger.
- Use a piece of soft gauze to gently compress the blister from the side to increase tension.
- Use a small hypodermic sterile needle (or small clean sharp scissors) to pierce the blister.
- Slide the needle through the blister to create an entry and exit point. If the blister is large, you may need to do this more the once.
- Withdraw the needle and gently press the blister with the gauze to remove the fluid.
- Dispose of the needle into a sharps bin.
- You don’t need to use a dressing if the top of the blister is still in place.
- Use a dressing is there is skin loss or if the area looks particularly sore.
- Use non-stick dressings and gentle bandaging. Apply dressings to open wounds to encourage healing and to prevent wounds from sticking to clothing.
- You can also use padded, non-stick dressings on areas prone to knocks such as elbows, hands and knees. This can help prevent damage to the skin likely to be exposed to damage,.
- Use a non-sting medical adhesive spray to remove dressings if they become stuck to the skin. This will help lift any dressings without causing pain or further damage.
- Keep the skin clean to help prevent infections.
- Infected wounds can be treated with topical wound gels, creams, and ointments. However, if your child has a fever, you should contact your GP- they may need antibiotics to help treat an infection. Please ask your GP to take a wound swab before prescribing antibiotics.
If you are concerned about your child’s wounds, please contact the EB nursing team to discuss the best treatment options.
Blisters and wounds can itch and be painful, and each child has different pain management needs.
Over the counter medications such as paracetamol and ibuprofen can help manage discomfort related to skin damage. Please speak with your child’s EB team about how to manage your child’s pain if you have any concerns.
· Use prescribed creams or oral medications as needed.
· Moisturise the skin daily to reduce dryness.
If your baby has a lot of very fragile skin, you can nurse them on a small soft pillow/ mattress.
To lift your baby from the mattress, apply a ‘roll and lift’ technique:
- Roll your baby onto their side.
- Place one hand behind their head and one hand under their bottom.
- Allow them to roll back onto your flat hands.
- Lift.
As you become confident in lifting your baby you may find you don’t need the pillow/ mattress.
To reduce the risk of skin blistering or skin tears we also recommend:
- Try to avoid picking babies and toddlers up by their armpits.
- Pad areas of the body prone to knocks and friction with dressings when your baby becomes more mobile.
- Apply dressing to open wounds to help reduce pain and potential infection.
If your child has a lot of damaged skin at birth, we recommend delaying bathing until healing has taken place. This is because bathing can be painful and it’s difficult to protect against further skin damage when all dressings are removed at once.
When you and your child are ready, we recommend bathing or showering to regularly cleanse the skin and to help prevent infections.
Tips for skin cleansing:
- Pre-cut replacement dressings before the bath so they’re ready to put on.
- If needed, give prescribed painkillers before bathing.
- Use a towelling baby seat rather than a plastic one if it’s difficult to hold your baby in the bath.
- If your baby has a lot of dressings, sometimes it’s easier to bathe them with their dressings on, then change them after the bath.
- Use an antimicrobial wash to help prevent skin infections. These should be rotated on a regular basis to prevent antimicrobial resistance.
- Milton baths, one to two times weekly can also be beneficial to help clean your baby’s skin.
- Pat skin dry with a soft towel rather than rubbing.
Initially dress your baby in a soft cotton baby grow that fastens at the front. They can wear this inside out to stop the seams from rubbing and causing blisters. Watch out for fasteners that may rub.
Try to dress your baby in softer, seamless clothes made of materials like cotton or bamboo.
Your child’s GP can also prescribe specialist clothes that can help keep dressings in place.
- Avoid using scented baby wipes if the nappy area is red or broken down.
- Cleanse with 50/50 ointment or Emollin emollient spray.
- Pop blisters (as above).
- Apply a layer of barrier cream, to any blistered areas or to any areas that the nappy may rub.
- Cover any open wounds with a dressing. You may also need to line the edges of the nappy with a soft material to prevent rubbing.
Tips for breastfeeding:
- Protect your baby’s face with a layer of emollient to reduce any friction from feeding.
- You can also apply emollient to the area around your nipple for further protection.
Tips for bottle feeding:
- A special teat like a Medela special needs feeder can be helpful, as it has a longer, slimmer teat made of ultra-soft silicone.
- You can apply a teething gel to the bottle teat or directly to the mouth before feeding to help ease pain. Gelclair® (a specialist gel) can also be used around or inside the mouth to help reduces pain.
Your child’s EB dietitian can advise on appropriate soft foods for weaning and supplements to make sure your child can meet their nutritional needs.
Constipation is a common problem with all types of EB. Blistering and soreness around the bottom can make it uncomfortable for your child to poo, and pain medicines and iron supplements can also cause constipation.
If you child is constipated, please speak with your child’s EB team who will be able to advise on medicine to help them poo, or make pooing more comfortable.
Missing and thickened nails is very common in babies with intermediate junctional EB.
- Keep nails short and smooth by trimming nails regularly with gentle rounded scissors or baby nail clippers.
- You can also file your baby’s nails to prevent them from scratching and causing blisters on other areas of skin.
- Wearing soft seamless mittens can help prevent further damage on the body from sharp nails.
- Thickened nails and inflamed nail beds can cause infection. Look out for signs of redness, swelling, pus or increased pain around the nail.
It is common in intermediate junctional EB for nails to fall off. If this happens keep the area clean. Cover the area with a small dressing or a wound gel and a mitten if you can.
Dry eyes caused by a reduced tear film can sometimes cause blistering on the surface of the eyes which can be painful.
An ophthalmologist (eye specialist) can prescribe eye drops or ointment to help keep the eyes moist and reduce the chance of blistering.
Please speak to your child’s EB team if you think your child has dry or sore eyes so they can advise you further.
Contact information
If you are at all concerned about any skin changes, please contact your EB team as soon as possible.
- Message us on MyGOSH
- Telephone: 0207 405 9200 Ext 5053
- Email: gos-tr.ebnurses@nhs.net