Congenital malformation surgery is reconstructive plastic surgery that corrects differences in the shape or structure of a part of the body that have been present since birth. At her Harley Street practice in London, Ms Anna De Leo assesses children, teenagers and adults with congenital differences of the ears, hands, breasts, chest wall and skin, and plans treatment that puts function, health and long-term wellbeing first.
Congenital differences are more common than many people realise, and they range from minor variations that need no treatment at all to complex conditions that benefit from a coordinated, multidisciplinary approach over several years. Many adults also seek advice for a difference that was never treated, or for a result from childhood surgery that they would like to refine. Whatever your situation, the first step is a calm, thorough consultation that explains what is possible, what is advisable and when.
01What Are Congenital Malformations?
A congenital malformation is a difference in the formation of a part of the body that develops before birth. The causes are varied: a minority are linked to genetic or chromosomal conditions, some are associated with environmental factors during pregnancy, and the majority arise from a combination of influences that cannot be pinned to a single cause. It is important to say clearly that, in the vast majority of cases, nothing the parents did or did not do caused the difference.
Some conditions are identified on antenatal scans; others become apparent at birth, during childhood or, in the case of breast and chest wall differences, only at puberty. Congenital malformation surgery has long been part of plastic and reconstructive practice, because it is the specialty dedicated to restoring form and function to tissues of every kind — skin, cartilage, muscle, tendon and bone.
Conditions commonly assessed
- Ear differences: prominent ears, constricted or folded ears, and accessory skin tags in front of the ear.
- Hand differences: extra digits (polydactyly), joined fingers (syndactyly) and other variations affecting grip and dexterity.
- Breast and chest wall differences: tuberous (constricted) breasts, significant breast asymmetry, and chest wall conditions such as Poland syndrome.
- Skin and soft tissue: congenital moles (congenital melanocytic naevi), certain birthmarks and vascular malformations, and cysts such as dermoid cysts.
- Residual deformities: secondary refinement of scars or contour following earlier reconstructive surgery, including adult revision after cleft lip repair.
02Who Is Congenital Malformation Surgery For?
Congenital malformation surgery may be appropriate when a difference affects function, causes physical symptoms, carries a health risk or has a significant impact on psychological wellbeing. Examples include a hand difference that interferes with grip or writing, a congenital mole that is large or changing, a breast difference causing distress and difficulty with clothing, or an ear shape that has led to teasing at school.
Equally, many differences do not need surgery. Part of good reconstructive practice is recognising when observation, reassurance or non-surgical support is the best option. For children, Ms De Leo always considers whether treatment is truly in the child's interest and whether the child, as they grow, is able to share in the decision.
Specialist networks and the NHS
Some complex congenital conditions — notably cleft lip and palate and certain craniofacial and complex paediatric hand conditions — are managed in the UK through dedicated NHS specialist networks with multidisciplinary teams. Where this is the right pathway for a child, Ms De Leo will say so plainly and help families understand how to access it. Private consultation on Harley Street can complement this care, for example as a second opinion or for adult refinement surgery once growth is complete.
03Your Consultation on Harley Street
Consultations take place at 64 Harley Street, in the heart of London's historic medical district in Marylebone. Ms Anna De Leo allows time to listen to the whole story: when the difference was first noticed, any previous treatment, how it affects daily life and what you or your child hope to achieve. Many families and young women tell us they find it easier to speak openly with a female surgeon, particularly about breast and chest differences.
The examination focuses on both appearance and function — range of movement, sensation, symmetry and the quality of the surrounding tissues. Depending on the condition, further investigations may be recommended, such as X-rays for hand differences, ultrasound or MRI for vascular malformations, photographs for monitoring a congenital mole, or genetic advice where a wider syndrome is suspected.
You will leave with a clear explanation of the options, including the option of not operating. Factors that influence the cost of a personalised plan include the complexity of the condition, the anaesthetic required, whether treatment is staged over more than one operation, and the follow-up needed. For purely cosmetic elements of treatment, a cooling-off period of at least two weeks between consultation and surgery is observed, in line with GMC guidance.
04Timing: When Is the Right Moment?
Timing is one of the most important decisions in congenital malformation surgery. Operating too early may mean working on tissues that are still growing; waiting too long may allow a functional problem or emotional burden to become established.
- Ear correction is generally considered from around five or six years of age, when the ear has reached most of its adult size and the child can take part in the decision. See our page on otoplasty.
- Hand differences that affect function are often addressed in early childhood, at a stage planned to support the development of grip and fine motor skills.
- Breast and chest wall differences are usually treated once breast development is complete, typically in the late teens or later, although support and planning can begin earlier.
- Congenital moles are assessed individually; removal may be advised for medical reasons or monitoring may be preferred.
For adults there is no upper age limit. Many people choose to address a difference later in life, when they feel ready and can make a fully informed decision for themselves.
Treating a difference present from birth is never only about appearance — it is about choosing the right moment, protecting function and respecting the person.
ADLSynergy · Harley Street
05Reconstructive Techniques Used
Every congenital difference is unique, so congenital malformation surgery is always planned individually. Ms De Leo draws on the full range of plastic surgery techniques:
- Tissue rearrangement and local flaps — moving nearby skin and soft tissue to release tight bands, separate joined fingers or reshape a contour, while keeping scars in natural lines.
- Skin grafts — used, for instance, when separating fingers in syndactyly, so that each digit is fully covered with healthy skin.
- Cartilage shaping — scoring, folding and suturing techniques to create a natural ear contour.
- Tissue expansion and implants — for tuberous breasts and chest wall differences, gradually creating space and volume before definitive reconstruction.
- Fat grafting (lipofilling) — transferring a patient's own fat to restore volume and soften contour irregularities. Read more about lipofilling.
- Microsurgical principles — precise handling of small blood vessels and nerves, an area in which Ms De Leo holds a European Master's Degree in Reconstructive Microsurgery.
Some conditions are best treated in stages, allowing each step to heal fully before the next. Your plan will explain clearly what each stage involves.
06Recovery and Long-Term Follow-Up
Recovery after congenital malformation surgery depends entirely on the procedure, which is carried out in an accredited London hospital or day-surgery unit. Ear correction is usually a day case, with a protective headband for a period afterwards. Hand surgery may require splints and specialist hand therapy. Breast and chest wall reconstruction typically involves a support garment and a gradual return to exercise over around six weeks.
Children are often remarkably resilient, but they still need careful pain control, reassurance and a plan for returning to school and sport. Adults commonly return to desk-based work within one to three weeks. The ADLSynergy recovery team can support scar care and lymphatic management, and our longevity and wellbeing programme offers nutritional and breathwork guidance to help tissues heal well.
Because congenital differences sit within a growing body, long-term follow-up matters. Ms Anna De Leo will advise how often reviews are needed and what signs should prompt you to get in touch sooner.
07Congenital Malformation Surgery: Risks and Results
All surgery carries risk. Depending on the procedure, these include bleeding and haematoma, infection, delayed wound healing, visible, thickened or stretched scars, altered sensation, asymmetry, stiffness after hand surgery, implant-related complications in breast reconstruction, and the need for further surgery. Children may need revision as they grow, because tissues continue to change after the initial operation.
Results vary from person to person. The aim of congenital malformation surgery is meaningful improvement — better function, a more balanced appearance and greater comfort — rather than an idealised result. Before and after photographs of comparable conditions are discussed at consultation to give an honest sense of what can be achieved.
08Why Choose Ms Anna De Leo on Harley Street
Ms Anna De Leo is a GMC-registered Plastic, Reconstructive and Aesthetic Surgery Consultant with more than twenty years of experience in helping people "improve, correct and re-functionalise body parts affected by imperfections, trauma, medical interventions or malformations". She is a Fellow of the European Board of Plastic, Reconstructive and Aesthetic Surgery (FEBOPRAS), holds a European Diploma in Hand Surgery and a European Master's Degree in Reconstructive Microsurgery, and is a member of BAPRAS. Her experience includes NHS posts at Chelsea and Westminster, the Royal Free in London and Oxford University Hospitals.
As a female plastic surgeon, she is particularly mindful of how sensitive consultations about the body can feel, especially for teenagers and young adults with breast or chest wall differences. If you are looking for a congenital deformity specialist in London or near Marylebone, you are welcome to book a consultation on Harley Street.
