A child who walks with a visible tilt. An adult whose leg never looked quite right after a fracture healed. A parent who notices their toddler’s knees bending inward. These are among the most common concerns that bring patients to an orthopaedic specialist in Patna and in almost every case, the first question is the same: what exactly is a limb deformity, and does it need to be treated?
This blog answers that question clearly. It explains what limb deformity means, what causes it, the different types seen most commonly in Bihar, and most importantly how to know when surgery is genuinely needed versus when monitoring is enough.
A limb deformity is any abnormality in the shape, alignment, length, or rotation of the bones of the arm or leg that causes it to differ from normal structure. This can mean a bone that curves in the wrong direction, a limb that is shorter than its counterpart, a joint that is positioned incorrectly, or a bone that healed after a fracture in a position that was never properly corrected.
Limb deformities are not rare. According to orthopaedic research, untreated lower limb deformities can alter the mechanical axis of the leg significantly, shifting the load through the knee joint abnormally and accelerating joint damage over time. This is why early evaluation matters.
Crucially, a limb deformity is not simply a cosmetic issue. When a bone is out of alignment, every step the patient takes loads the joints, the knee, hip, and ankle, in a way they were not designed to handle. Over years, this causes pain, stiffness, and early arthritis. The deformity is the cause; the arthritis is the consequence.
Deformities of the limbs develop through several different pathways. Understanding the cause is essential because it directly determines which treatment will work.
Some deformities are present from birth, either because of genetic factors or events during foetal development. These include conditions like club foot (where the foot turns inward and downward), developmental dysplasia of the hip (where the hip socket is shallow or malformed), and congenital limb length discrepancy (where one limb forms shorter than the other).
In Bihar, one of the most common causes of congenital-type deformity in children is Vitamin D deficiency leading to rickets. When children do not get adequate Vitamin D and calcium during early growth, the soft bones bend under body weight, creating bow legs (Genu Varum) or, in some cases, knock knees (Genu Valgum). This is not a birth deformity in the strict sense, but it develops in the first years of life and requires specialist evaluation.
This is one of the most common causes of limb deformity in adults across Patna and Bihar. When a fracture is not treated promptly, not treated by a specialist, or managed incorrectly, the bone can heal in a maligned position. This is called a malunited fracture, and it is entirely correctable with the right surgical approach.
Bihar’s high road accident rate means that malunited fractures are seen frequently in orthopaedic practice here. A patient who sustained a tibia or femur fracture in a road accident two years ago and now walks with a limp and a visibly crooked leg is a classic example. The deformity developed not at the time of the accident, but because of how the fracture was managed in the weeks and months that followed.
Bone infection (osteomyelitis), particularly in children, can destroy bone tissue, causing shortening, angular deformity, or a gap in the bone. Post infective deformities are complex and require careful surgical planning, but they are treatable. These cases are a specific area of focus in Dr. Jaswinder Singh’s practice at Orthovita Hospital, Patna.
Children’s bones grow at specialised zones called growth plates, located near the ends of long bones. If a fracture passes through a growth plate and is not managed correctly, it can damage or partially arrest growth on one side. This causes progressive deformity and limb length discrepancy as the child grows. Damage to a growth plate is an orthopaedic emergency in children and one of the most important reasons that childhood bone fractures in Patna must be evaluated by a specialist, not managed at a general facility.
Conditions such as cerebral palsy, polio, and spina bifida cause muscle imbalance that progressively pulls bones out of alignment. Arthritis, when advanced, can cause the knee or hip joint itself to deform. These deformities are usually progressive and require both medical and surgical management as part of a longer-term care plan.
For limb deformities in children specifically, see our [Paediatric Orthopaedics in Patna guide].
These are the deformity types seen most frequently by Dr. Jaswinder Singh at Orthovita Hospital:
Not every bone abnormality needs immediate surgery. But every bone abnormality in a child or adult deserves a specialist evaluation so that you know whether it is safe to wait, or whether delay is causing damage that is accumulating silently.
Important: Waiting is Not Always Safe
A common mistake is to watch and wait with a deformity, hoping it will improve on its own. In children, deformities often worsen as the child grows, what is correctable with a minor procedure at age 10 may require major surgery at age 18.
In adults, every year of living with a malunited fracture or angular deformity causes measurable additional damage to the adjacent joint, damage that cannot be fully reversed by any subsequent surgery.
If there is any doubt, the right step is a consultation, not continued observation.
Surgery for limb deformity is recommended when the deformity is structural, meaning the bone itself is in the wrong position, and when non surgical measures cannot provide a satisfactory correction.
The following situations generally indicate that surgery is the appropriate treatment:
Non surgical management, serial casting, bracing, physiotherapy, plays an important role for specific conditions and age groups, particularly infants with club foot (where the American Academy of Orthopaedic Surgeons endorses the Ponseti casting method as the gold standard). However, for structural bone deformities in children beyond early infancy and in adults, surgery is typically the only path to genuine, lasting correction.
If you or your child has a limb deformity, the starting point is a thorough evaluation, not a rushed decision about surgery. At Orthovita Hospital, Bailey Road, Patna, Dr. Jaswinder Singh assesses each patient with full-length standing X rays, gait analysis, and a detailed clinical examination before any surgical plan is discussed.
The full range of deformity correction surgery in Patna is available at Orthovita Hospital, including osteotomy (bone realignment), the Ilizarov technique for gradual correction, guided growth plate surgery for growing children, and leg lengthening surgery. For patients with post traumatic or post infection deformity, Dr. Singh’s background in Complex Trauma and Paediatric Orthopaedic surgery means that even the most complex presentations can be planned and treated locally in Bihar, without travelling to Delhi or Mumbai.
Dr. Jaswinder Singh offers specialist consultations at Orthovita Hospital, Bailey Road, Rukanpura, Patna.
Book your consultation today to discuss your or your child’s limb deformity and get a personalised treatment plan.
Bow legs (Genu Varum) means the legs curve outward. When the feet are together, there is a gap between the knees. Knock knees (Genu Valgum) is the opposite: the knees angle inward, and there is a gap between the ankles. Both are types of angular limb deformity. In young children, mild cases of both conditions can be physiological (normal for the age) and may not require treatment. Persistent deformity beyond the expected age of resolution, or deformity that is severe, painful, or progressive, should be evaluated by an orthopaedic specialist in Patna.
Some deformities in very young children, particularly club foot in newborns, respond well to serial casting without surgery. Mild angular deformities in toddlers may resolve with observation and nutritional support, particularly Vitamin D correction for rickets-related bow legs. However, structural bone deformities in older children and adults cannot be corrected with physiotherapy, bracing, or medication alone. In these cases, surgery is the only definitive treatment. The specific approach depends on the type and severity of the deformity, the patient’s age, and whether the growth plates are still open.
Yes. A fracture that heals in incorrect alignment is called a malunited fracture, and it is one of the most common forms of acquired limb deformity. Whether treatment is needed depends on the degree of malunion, the age of the patient, the location of the fracture, and the functional impact. In growing children, some remodelling can occur naturally. In adults, malunited fractures generally do not self-correct and may worsen over time as they alter joint loading. Dr. Jaswinder Singh at Orthovita Hospital, Patna evaluates malunited fractures with full-length X-rays and advises on whether correction is needed.
A degree of bow legs is normal in toddlers up to approximately age 2–3, as it reflects the position of the legs in the womb. After age 3, bow legs should progressively reduce. If bowing is still pronounced beyond age 3, is worsening rather than improving, is affecting only one leg, or is accompanied by pain or difficulty walking, it should be assessed by an orthopaedic specialist. In Bihar, nutritional rickets is a common underlying cause. Vitamin D and calcium levels should be checked and corrected, but the bone deformity itself may still require specialist management.
Medical Disclaimer
This article has been written and reviewed by Dr. Jaswinder Singh (MBBS, MS, DNB, MCh, DSICOT Belgium, MRCSA Glasgow) for educational purposes only. It does not constitute medical advice, diagnosis, or a treatment recommendation. Medical conditions vary significantly between individuals. Please consult Dr. Jaswinder Singh or a qualified orthopaedic surgeon before making any decision about your health or treatment. Last reviewed: March 2026.