In short. Microtia reconstruction is the staged rebuilding of an underdeveloped outer ear, usually with the child's own rib cartilage. Surgery is generally planned between six and ten years, when the chest can supply enough cartilage and the other ear has nearly reached adult size. The aim is a natural match, not a mirror image.
Key points
- Microtia is an underdeveloped outer ear, sometimes with no ear canal.
- Most children have a working inner ear; hearing assessment is always part of the work-up.
- Rib cartilage is the reference standard because it is living tissue that grows with the child.
- Stage one builds the framework; a later stage lifts the ear for projection.
- Synthetic frameworks avoid the chest incision but carry a higher lifetime risk.
What is microtia?
Microtia is a congenital difference in which the outer ear (the auricle) is underdeveloped, ranging from a slightly small ear to a mostly absent one, sometimes with no ear canal at all. It affects roughly one in several thousand births, occurs more often on one side, and is more common in boys. Most children with microtia have a working inner ear and can hear to some degree, especially when the other ear is normal, but hearing assessment is always part of the work-up.
Causes and grading
In most families no single cause is found; microtia results from altered development of the ear hillocks in early pregnancy and is sometimes associated with genetic conditions or syndromes such as hemifacial microsomia. Surgeons grade severity to plan treatment: a mild form keeps a recognisable ear shape but smaller; moderate forms have a distorted, peanut-like remnant; the most severe form leaves only a small tag of tissue (anotia). The grade, together with the condition of the skin and the position of the remnant, shapes the reconstruction plan.
Timing: why the chest and the other ear set the age
Reconstruction is usually planned for the age of six to ten years, when the chest is large enough to provide sufficient rib cartilage and the normal ear has reached close to its adult size. Earlier surgery risks an ear that is too small for the adult face. If a child is being teased at school, timing can be adjusted with the family's input. Adults with untreated microtia can also be reconstructed, sometimes with different material choices.
Assessment before surgery
Planning starts with photographs and measurements of both ears, examination of the chest wall, and hearing testing. Some children need imaging or genetics referral when a syndrome is suspected. The family is shown framework drawings so the goals of each stage are understood: a natural ear shape that matches the other side as closely as the tissue allows, not a mirror image.
How the ear is rebuilt in stages
The most durable method uses the child's own rib cartilage. In the first main stage, cartilage is sculpted from several ribs into a framework that imitates the natural ear's ridges and hollows, then placed under the scalp skin at the correct position and angle. Because the structure of the ear has depth, reconstruction is staged.
Stage one builds the cartilage framework and creates the basic ear outline. Stage two, usually months later, lifts the ear away from the head to give it projection and places a small skin graft behind it. Further small refinements (shaping the groove in front of the ear, adjusting the lobe, or releasing tight areas) complete the result.
| Step or choice | What it involves | Usual timing | What to understand |
|---|---|---|---|
| Assessment | Photographs, measurements, chest wall and hearing tests | Before any stage | The goal is a match, not a mirror image |
| Stage one | Rib cartilage sculpted into a framework under the scalp skin | Usually six to ten years | It creates the outline, not the final projection |
| Stage two | The ear is lifted from the head with a skin graft behind it | Usually months later | It gives projection |
| Refinements | Groove in front of the ear, lobe adjustment, release of tight areas | After the tissues soften | They complete the result |
| Synthetic framework | Avoids the chest incision | Selected older patients or special circumstances | Higher lifetime risk of exposure and infection |
Rib cartilage or a synthetic framework?
Autologous rib cartilage remains the reference standard: it is living tissue, grows with the child, resists infection, and rarely needs replacement. Synthetic frameworks avoid the chest incision but carry a higher lifetime risk of exposure and infection and are generally reserved for selected older patients or special circumstances. Each option is discussed with the family with its real trade-offs.
Anaesthesia, hospital stay and recovery
Each stage is performed under general anaesthesia. The cartilage stage usually means several nights in hospital for pain control and wound care, with a soft head dressing the child wears for weeks. Later stages are shorter stays, and a small scar on the chest is part of the cartilage harvest, closed in a fine line.
In the first one to two weeks the child rests with the head elevated and the new ear protected from pressure, returning to school when comfortable. From weeks three to six, contact sports and rough play are restricted to protect the healing framework. Over months to a year the swelling settles and the ear outline becomes clearer, and revision details are judged only after the tissues soften.
Complications and when to contact the team
These operations are safe in experienced hands but not simple. Specific risks include cartilage resorption or warping over time, skin breakdown that exposes the framework, infection, chest wall soreness or, rarely, a chest wall contour change, and asymmetry. A minority of children need a touch-up procedure. Smoking in the household around wound healing, uncontrolled illness, or unrealistic expectations are discussed openly before any stage.
Contact the team promptly if the ear becomes red, swollen, increasingly painful or discharges after surgery, if the chest wound gapes or breathing becomes painful or difficult, or if a blow to the ear causes a sudden change in shape.
A team, not a single operation
Microtia care is multidisciplinary: the plastic surgeon, ENT or hearing specialist, and, when needed, genetics and psychology teams coordinate so the child hears well, looks natural, and grows up confident.
Sources
Internal links
Frequently asked questions
At what age is ear reconstruction usually done?
Usually between six and ten years, when the chest provides enough rib cartilage and the normal ear has nearly reached adult size. Earlier surgery risks an ear that is too small for the adult face. Adults with untreated microtia can also be reconstructed.
Why is the surgery performed in stages?
Because the ear has depth. The first stage builds the cartilage framework and the basic outline; a later stage lifts the ear away from the head and places a skin graft behind it; further small refinements complete the result. Months separate the stages.
Where does the cartilage come from, and what does it cost the chest?
From the patient’s own ribs, through a short chest incision closed in a fine line. Autologous cartilage is living tissue that grows with the child and rarely needs replacement. Chest soreness and, rarely, a chest wall contour change are the donor-site risks.
Risks & Limitations
- Reconstruction is usually staged — more than one operation is normal, and the plan may change as healing progresses.
- Donor-site scarring and discomfort, including after rib cartilage harvest.
- Partial or complete failure of a flap or graft, which may require further surgery.
- Scars are permanent. They mature and fade but never disappear.
- Asymmetry and the inherent limits of matching a normal side.
- Altered sensation, numbness or weakness in the operated area.
- Contracture, which may need release procedures later.
- Final assessment is made at 6–12 months, and longer in growing children.
When to Seek Care
- A flap or graft that turns dark, cold, black or stops bleeding when pricked.
- Fever above 38 °C, or spreading redness, warmth or discharge around a wound.
- New or worsening pain, swelling or fluid leakage from the operative site.
- Bleeding that does not stop with gentle pressure.
- Any change in a reconstructed area that concerns you, however minor.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — reconstructive surgery guidance
- World Health Organization (WHO) — burn and trauma care resources
- Chinese Medical Association, Plastic Surgery Branch — clinical guidance
- Cochrane Library — systematic reviews in wound and reconstructive care
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.