In short
- 🔑 A deformity and a malformation are not the same thing. In a deformity all the parts are there and are simply folded wrongly; in a malformation tissue is missing.
- Deformities can be moulded in the newborn and operated on later.
- Microtia is a malformation and needs complex surgical reconstruction.
- The constricted ear, the Stahl’s ear and cryptotia are deformities with names of their own, and they respond well to early moulding.
- Many abnormalities in the newborn resolve on their own in the first month.
- If a newborn’s ear looks odd in any way, seek advice early. The window for moulding is short.
When someone looks for information about ears they always end up at prominent ears, which are by far the most common. But there are others: ears that curl over at the top, ears with an extra fold, ears whose upper pole is buried under the skin, ears that are simply large. Each has a name and each behaves differently.
And there is one distinction that orders everything else, far more useful than the list of names: whether the ear is short of tissue or is merely folded wrongly. That is what determines whether it can be moulded, operated on or needs to be reconstructed.
Prominent ears, which are something else and the most common of all, are covered in why prominent ears happen.
The distinction that orders everything
Before the names, this:
- Deformity. The ear has all its components, but one of them is folded, curled or placed wrongly. It is a problem of shape, not of missing material. These are the majority, and they are the ones that can be moulded in the first weeks of life and corrected surgically later.
- Malformation. Tissue is missing. The ear did not develop fully, and no amount of moulding will manufacture what is not there. It requires reconstruction.
This is not an academic nicety. It is exactly why some babies are offered a mould and others are referred to a reconstruction team.
The ones that are deformities
Constricted ear (also “cup ear” or “lop ear”). The upper rim of the ear is curled inwards and downwards, as if the top had folded over on itself. The ear looks smaller and gathered up at the top. It is one of those that respond best to early moulding.
Stahl’s ear. An extra fold appears, crossing the ear towards the rim where there should be none, and giving the outline its characteristic pointed look. It is popularly known as a “Spock ear” or “elf ear”.
Cryptotia. The upper pole of the ear is buried under the skin of the scalp, so that the rim cannot be lifted away from the head. It shows best when you try to ease the ear away gently: the groove is missing. In a series of 42 cases treated with non-invasive correction, effectiveness was reported at 100%, with better results on the cartilage the earlier it was started; after six months, the improvement was more about freeing the buried pole than about correcting the shape of the cartilage.
Macrotia. The ear is well formed but larger than usual. It is corrected surgically by reducing the auricle, and it is not the same as a prominent ear: an ear can be large and lie flat, or normal and stand away.
Split earlobe and other variants. It has a classification of its own and its treatment is surgical and straightforward, with different techniques according to the type. When the problem is only the lobe, the operation is earlobe repair.
All of these share what matters: in the newborn they can be moulded. In a series of 25 babies and 50 ears treated with a moulding system — including Stahl’s ears, helical deformities, cup ears and lop ears — correction was completed in every case, without surgery.
Microtia is something else, and we do not treat it here
Microtia is a malformation: the auricle never formed, and what is there is a remnant of tissue of varying size and shape, sometimes accompanied by abnormalities of the ear canal.
Its treatment is not an otoplasty. It is a complex reconstruction, usually in several surgical stages and with grafts of the patient’s own cartilage or specific materials, carried out by teams dedicated to it and planned alongside the assessment of the child’s hearing.
At the Instituto de Cirugía Plástica del Mediterráneo we do not carry out microtia reconstruction. If that is what your child has, the honest thing is to tell you so and point you towards a team that does, not to bring you to a consultation that will not resolve anything.
What is worth knowing is that neonatal moulding can have a part to play even there, not to avoid the reconstruction but to improve the starting conditions in some cases, which is one more reason to seek advice early rather than wait.
If you have just noticed something odd about your baby’s ear
Three things, in this order:
- That many resolve on their own. In a study of 1,500 newborns examined in the first week and again at one month, close to a third of the ear abnormalities had resolved spontaneously by 30 days.
- That the window for moulding is short. It works best in the first 21 days of life and effectiveness falls significantly after three months. Seeking advice early does not commit you to treatment; arriving late does close the door.
- That you do not need an exact diagnosis in order to ask. You do not need to know whether it is a constricted ear or a Stahl’s ear: that is what the assessment is for.
All the detail about moulding is on the page about moulding in the newborn.
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Frequently asked questions
What is a constricted or “cup” ear?
An ear whose upper rim is curled inwards and downwards, so that the top looks folded over on itself and the ear appears smaller and gathered up. It is a deformity, not a malformation: all the parts are there, folded wrongly.
What is a Stahl’s ear?
An ear with an extra fold crossing it towards the rim, where normally there is none, giving it a pointed outline. It is popularly called a “Spock ear”.
What is cryptotia?
An ear whose upper pole is buried under the skin of the scalp, so that the rim cannot be lifted away from the head because the groove is missing. It responds well to non-invasive correction, the earlier the better.
Can they be corrected without surgery?
In the newborn, yes: all these deformities can be moulded in the first weeks of life, and the published series report good results. Once that window has passed, correction is surgical. What a mould never corrects is a malformation, because there tissue is missing.
My child has microtia — do you operate on it?
No. Microtia reconstruction is complex surgery, usually in several stages, carried out by teams dedicated to it, and we do not do it at our centre. We would rather tell you from the outset so that you can find a team that does.
What is the difference between a large ear and a prominent ear?
They are different things and may or may not go together. Macrotia is a well-formed ear that is simply larger; a prominent ear is one that stands away from the head, whatever its size. An ear can be large and lie flat, or of normal size and stand well away.
At what age are these abnormalities operated on if the window for moulding has passed?
The general reference for ear surgery in children is 5 or 6 years, when the auricle has reached around 80 to 90% of its adult size. The particular technique depends on which abnormality it is and is decided at the assessment.
My baby has one ear different from the other. Is that normal?
It is common for the two ears not to be identical, and many abnormalities in the newborn resolve on their own in the first month. That said, if it catches your eye, ask early: the window in which a mould can do anything is a matter of weeks.
Sources
- Li J, Bai Y, Yang D, Chen L. The application of domestic ear molding system in bilateral neonatal congenital ear malformation]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2026;40(7):682-685. [PMID 42402690 — 25 cases and 50 ears treated with non-surgical moulding: 14 Stahl’s ears, 11 helical deformities, 8 cup ears and 17 lop ears, with complete correction in every infant. This is the source for these deformities being mouldable.
- Zhou Z, Shen J, Lin L, Chen W, Fu Y. Efficacy analysis of non-invasive correction for congenital cryptotia with auricular cartilage deformities. Braz J Otorhinolaryngol. 2025;91(4):101630. PMID 40319758 — 42 cases of cryptotia corrected non-invasively with 100% effectiveness; the results on the cartilage were better the earlier it was started, and beyond 180 days the improvement centred on freeing the buried pole.
- Zhao H, Ma L, Qi X, et al. A Morphometric Study of the Newborn Ear and an Analysis of Factors Related to Congenital Auricular Deformities. Plast Reconstr Surg. 2017;140(1):147-155. PMID 28654602 — 1,500 newborns examined in the first week and again at one month: an incidence of ear abnormality of 57.46% and spontaneous resolution of 31.55% at 30 days, with differences between types.
- Sulibhavi A, Reddy SP, Butts SC, Schmalbach CE. Ear Molding in Children—Timing, Technique, and Follow-up: A Systematic Review. Facial Plast Surg Aesthet Med. 2024;26(6):730-739. PMID 38963392 — 37 studies and 3,341 patients: the evidence supports starting moulding in the first weeks of life.
- Deng Y, Zhao H, Chen J, et al. Reconstruction of microtia with crus helicis transversal deformity using flap technique combined with ear cartilage transplantation: a retrospective study. Maxillofac Plast Reconstr Surg. 2026;48(1):9. PMID 41964724 — 42 patients with microtia treated by a flap technique combined with auricular cartilage transplantation. It illustrates that microtia calls for surgical reconstruction and not correction of shape.
- Pawar SS, Koch CA, Murakami C. Treatment of Prominent Ears and Otoplasty: A Contemporary Review. JAMA Facial Plast Surg. 2015;17(6):449-454. PMID 26158729 — Prominent ears affect approximately 5% of the population; a review of how the techniques have developed from neonatal moulding through to surgery.
Book your consultation
If you have come here looking for the name of what your baby has, the good news is that you do not need to know it in order to ask. What matters is the calendar: in the first weeks there is a margin for moulding that afterwards no longer exists.
At the assessment we identify which abnormality it is, whether it can be moulded and what can be done and when. And if it is a malformation we do not treat here, we will tell you so at that same appointment and point you in the right direction.
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Last reviewed: 6 September 2026. This content is for information only and does not replace an individual assessment by a healthcare professional.
