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PubMed This is a summary of 20 peer-reviewed journal articles Updated
Neonatology

When Does Aplasia Cutis Congenita Require Surgery?

At a Glance

Most babies with aplasia cutis congenita do not need surgery and heal well through daily conservative wound care. Surgery is generally reserved for emergencies involving severe bleeding, exposed brain tissue with high infection risk, or massive wounds that fail to heal.

While seeing an open wound on your newborn can be terrifying, the medical team has clear, established protocols for keeping your baby safe. For most babies born with aplasia cutis congenita (ACC), surgery is not necessary. The standard of care—careful, daily conservative wound management using specialized dressings and ointments—is highly preferred and usually successful [1][2]. Even relatively large areas of missing skin can heal remarkably well on their own over a period of weeks to months as new skin grows in from the edges [3].

However, there are specific situations where the medical team will need to shift from conservative care to surgical intervention. Because every baby’s anatomy and healing process is different, decisions are made by a multidisciplinary team (often including neonatologists, pediatric dermatologists, plastic surgeons, and neurosurgeons) who weigh the risks of surgery against the risks of leaving the wound open [4][5].

The decision to operate usually comes down to three primary clinical scenarios:

Severe Active Hemorrhage

The most critical and immediate reason for surgery is bleeding that cannot be stopped. This is particularly a risk when ACC occurs on the scalp directly over the superior sagittal sinus, a major vein that runs front-to-back just beneath the skull [6][7]. Many serious bleeds occur if a hard, dry scab (eschar) over the vein is bumped or peels off prematurely, which is why keeping the area moist with specialized ointments is so vital.

If this vessel is exposed or compromised, it can lead to severe, life-threatening blood loss [8][9]. In these emergencies, acute surgical closure is a lifesaving necessity to protect the vein and stop the bleeding [10][11].

High-Risk Exposed Brain Tissue or Bone

When a deep lesion involves missing skull bone or exposes the dura mater (the tough membrane surrounding the brain), the risk of severe complications increases [7][12]. Exposed deep tissues are highly vulnerable to drying out and bacterial infection. If the protective layers over the brain are missing or breached, it poses a risk for serious central nervous system infections, such as meningitis [13][9].

However, exposed bone or dura is not always an immediate reason for surgery; many deep wounds can still be managed conservatively if they are forming healthy, protective tissue. Surgery is typically required if there is a leak of spinal fluid, an imminent risk of underlying vessels rupturing, or if conservative dressings fail to encourage protective tissue to grow over these deep structures [14].

Massive Lesion Size Failing to Progress

While there is no universal “size cutoff” for surgery, some extremely large lesions simply will not close with dressings alone [15]. If a massive lesion fails to shrink or shows signs of breaking down after weeks of rigorous conservative management, surgeons may need to step in to close the wound. To do this, they may use skin grafts (taking a thin layer of healthy skin from another part of the baby’s body) or local flaps (gently stretching and moving nearby healthy scalp tissue over the wound). In some cases, advanced synthetic dermal substitutes (artificial skin-like coverings) provide a safe pathway to close the defect [16].

Warning Signs to Watch For

If you are managing your baby’s wound at home or watching them in the NICU, contact your care team immediately if you notice:

  • Active, bright red bleeding from the wound that does not stop with gentle pressure.
  • Signs of infection, such as increased redness around the edges, warmth, foul-smelling drainage, or a sudden fever.
  • Changes in your baby’s behavior, such as extreme lethargy or poor feeding.

What to Expect Long-Term

If your child’s care team suggests surgery, it means they have determined that the risks of continued conservative care—such as bleeding or infection—now outweigh the stress of an operation [17][18]. Acute lifesaving surgery, like a skin graft, will usually leave a hairless scar on the scalp [14].

However, as your child grows older, cosmetic reconstructive options become available. For example, surgeons can eventually use tissue expanders (small medical balloons placed under nearby healthy scalp to slowly grow more hair-bearing skin) to remove the scar and restore hair growth in a safe, elective, and planned procedure [19][20].

Common questions in this guide

Does aplasia cutis congenita usually require surgery?
No, most babies born with aplasia cutis congenita do not need surgery. The standard treatment is careful, daily conservative wound care using specialized ointments and dressings to let the skin heal naturally over weeks or months.
What are the signs that my baby's aplasia cutis congenita wound is infected?
Signs of infection include increased redness around the wound edges, warmth, foul-smelling drainage, or a sudden fever. You should also watch for changes in your baby's behavior, such as extreme lethargy or poor feeding, and contact your doctor immediately if these occur.
Why is bleeding a major concern with aplasia cutis congenita on the scalp?
When the missing skin is over the superior sagittal sinus, a major vein located under the skull, there is a risk of severe bleeding. If a hard scab forms and peels off prematurely, it can tear this vessel and require emergency lifesaving surgery.
Can aplasia cutis congenita scars be fixed later in life?
Yes, while lifesaving treatments like skin grafts may leave a hairless scar on the scalp, there are reconstructive options as your child grows. Surgeons can use tissue expanders to safely grow more hair-bearing skin and remove the scar in a planned, elective procedure.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.What specific ointments and dressings should we use to keep my baby's lesion moist and prevent dangerous dry scabs from forming?
  2. 2.Based on the exact depth and location of my baby's lesion, what specific warning signs of infection or bleeding should I be watching for?
  3. 3.Is the superior sagittal sinus exposed or at risk in my baby's case, and what is our immediate emergency plan if it begins to bleed?
  4. 4.How long should we expect conservative healing to take before we evaluate whether the wound is 'failing to progress'?
  5. 5.Who specifically should we contact in the middle of the night if we suspect a complication with the wound?

Questions For You

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Related questions

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References

References (20)
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This page provides general information about surgical indications for aplasia cutis congenita. Always consult your pediatric care team for advice on your baby's specific condition and wound management.

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