Growth Plate Fractures

What is a growth plate fracture?

A growth plate fracture is a break that involves the growth plate, the area of soft, developing tissue near the ends of a child’s long bones. Doctors call the growth plate the physis. It is made of cartilage (a firm but flexible tissue) rather than hard bone, and it is where new bone forms as a child grows taller. Because cartilage is weaker than mature bone, the growth plate is often the part of the bone most likely to give way when a child is injured.

Growth plate fractures happen only in children and teenagers whose bones are still growing. Once growth is complete, usually in the mid to late teens, the growth plates harden into solid bone and can no longer be fractured in this way. The bones most often affected include the long bones of the fingers, the forearm near the wrist (the radius and ulna), the lower leg near the ankle (the tibia and fibula), and the thigh bone near the knee (the femur).

A growth plate injury matters because the growth plate controls the future length and shape of the bone. In many cases the fracture heals without any lasting effect. In a smaller number of cases, however, damage to the growth plate can slow or stop growth in part or all of the bone, which may lead to a limb that ends up shorter or crooked. This is why doctors follow children with these injuries carefully, sometimes for a year or more after the bone appears to have healed.

Growth plate fractures are usually classified using the Salter-Harris system, named after the two doctors who described it. A Salter-Harris fracture is graded from type I to type V depending on which parts of the bone are involved. Lower numbers generally describe simpler injuries; higher numbers describe fractures that cross more of the growth plate or crush it, and these carry a higher chance of growth problems.

Growth plate fracture symptoms

Growth plate fracture symptoms can look very much like a sprain, which is one reason these injuries are sometimes missed at first. Because the growth plate sits close to the joint, pain and swelling often appear near the end of the bone rather than in the middle. Common signs include:

• Pain that is sharpest when pressing on the end of a bone near a joint
• Swelling, warmth, or bruising around the injured area
• Difficulty or refusal to move the limb, or to put weight on the leg
• Tenderness that persists for more than a day or two after an injury
• A visible bend, angle, or deformity in the limb in more severe fractures
• Stiffness or reduced range of motion in the nearby joint

Symptoms can vary by the type of fracture. A type I or type II Salter-Harris fracture may cause pain and swelling with little or no visible deformity, and a young child may simply hold the arm still or limp. A type III or IV fracture, which extends into the joint, often produces more swelling and a greater unwillingness to move the joint. A type V fracture, in which the growth plate is crushed, can be surprisingly quiet at the time of injury and may only become apparent months later when growth slows or the limb starts to angle.

Very young children may not be able to describe pain clearly. Parents may notice that a toddler suddenly stops using an arm, cries when the limb is touched, or refuses to walk. Any persistent change in how a child uses a limb after a fall or a blow deserves medical assessment.

Causes and risk factors

Most growth plate fractures result from a single sudden injury. Common causes include:

• Falls, for example from playground equipment, bicycles, or while running
• Sports injuries, especially in contact sports such as football or in sports with frequent falls such as skateboarding, skiing, and gymnastics
• Motor vehicle or bicycle collisions
• Twisting injuries, such as catching a foot while turning
• Direct blows to a limb

Less commonly, a growth plate injury develops gradually rather than from one event. Repeated stress on a growth plate, seen in some young athletes who train intensively, can irritate or injure the growing tissue over time. Gymnasts who bear weight through their wrists and young pitchers who throw repeatedly are examples of groups in whom this pattern has been described.

Several factors are linked to a higher chance of a growth plate fracture or of complications afterward:

• Age and sex: these fractures are more common in boys, partly because boys tend to finish growing later, so their growth plates remain open longer.
• Growth spurts: the growth plate is thought to be more vulnerable during periods of rapid growth in early adolescence.
• Participation in high-impact or high-speed sports.
• Fracture type and location: higher-grade Salter-Harris fractures and injuries around the knee carry a greater risk of growth disturbance.
• Delay in diagnosis or treatment, which may allow the bone to heal in a poor position.
• Certain medical conditions that affect bone strength, and some medicines or treatments such as radiation, which can weaken bone tissue.

Diagnosis

Diagnosis begins with a careful history and physical examination. The doctor will ask how the injury happened, where the pain is, and whether the child can move the limb or bear weight. On examination, the doctor gently presses along the bone to find the point of greatest tenderness. Tenderness directly over the growth plate raises suspicion of a fracture even when the joint itself is not painful.

The main tests used to confirm a growth plate fracture include:

• X-rays: the first and most common imaging test. Because cartilage does not show up on X-ray, a fracture through the growth plate can be subtle. Doctors often compare the injured side with an X-ray of the uninjured limb to look for widening or shifting of the growth plate.
• Magnetic resonance imaging (MRI): a scan that uses magnetic fields to show soft tissue and cartilage in detail. It may be used when X-rays are normal but symptoms strongly suggest a growth plate injury, or to look for damage that X-rays cannot show.
• Computed tomography (CT): a detailed X-ray-based scan that may be used to map complex fractures that involve the joint surface before planning surgery.
• Follow-up X-rays: in some cases a fracture is not visible at first but becomes clearer on a repeat X-ray taken one to two weeks later as healing begins.

When a fracture is confirmed, the doctor assigns a Salter-Harris type. In brief, type I runs across the growth plate only; type II crosses the growth plate and extends into the shaft of the bone; type III crosses the growth plate and extends into the joint end of the bone; type IV runs through the shaft, the growth plate, and the joint end; and type V is a crushing injury to the growth plate. This classification helps guide treatment and gives an idea of the risk of future growth problems.

Because a clinical suspicion of growth plate injury is sometimes treated even when X-rays look normal, children with tenderness over a growth plate are often placed in a splint and re-examined rather than being sent home as having a simple sprain.

Growth plate fracture treatment options

Growth plate fracture treatment depends on the type of fracture, the bone involved, how far the pieces have moved, and the child’s age. Most growth plate fractures are treated without surgery. Care for children with these injuries is generally provided by orthopedic specialists, and at Acibadem this falls under the Orthopedics & Joint Center.

Immobilization. When the bone pieces are still in a good position, the standard treatment is to hold the limb still with a cast or splint so the bone can heal. Casting usually lasts several weeks, with the exact time depending on the bone and the child’s age. Younger children tend to heal faster than teenagers. Follow-up X-rays are taken during this period to confirm that the pieces have not shifted.

Reduction. If the bone ends have moved out of place, the doctor may need to move them back into alignment. This is called reduction. A closed reduction is done without surgery, usually with sedation or anesthesia to keep the child comfortable and relaxed, and is followed by casting. Doctors generally try to perform reduction promptly and gently, because repeated or forceful manipulation can further injure the growth plate.

Surgery. Surgery may be recommended when the fracture cannot be held in a good position with a cast, when the fracture extends into the joint surface (as in types III and IV), or when the pieces are badly displaced. The surgeon realigns the bone and may hold it in place with thin metal pins, screws, or plates. This is known as internal fixation. Hardware is often removed later, but the plan varies from child to child. A cast is usually still worn after surgery while the bone heals.

Medication. Pain is typically managed with over-the-counter medicines such as acetaminophen or ibuprofen at doses appropriate for the child’s weight, as advised by the treating doctor. Stronger pain medicines are rarely needed for long. Antibiotics are used only when there is an open wound or a specific reason to prevent infection.

Rehabilitation. After the cast comes off, the joint may be stiff and the muscles weak from disuse. Many children regain movement on their own through everyday activity. Some benefit from physical therapy, in which a therapist guides exercises to restore range of motion, strength, and balance. Return to sports is usually delayed until the bone has healed and the limb has recovered its strength, which the doctor will judge on examination and X-rays.

Long-term monitoring. Because growth disturbance may not show up for months, follow-up visits often continue for at least a year after the injury, and sometimes until the child has finished growing. If the growth plate does close early in one area, further treatment may be considered. Options in that situation can include procedures to remove a bony bridge across the growth plate, to guide the growth of the bone, or, later, to correct length or angle differences. These are individual decisions made with a pediatric orthopedic specialist.

Living with growth plate fractures and outlook

For most children, the outlook after a growth plate fracture is good. The great majority heal without any lasting problem, and the child returns to normal activity within a few months. Growth plate fractures generally heal faster than similar breaks in adult bone.

The main long-term concern is a growth disturbance. If a portion of the growth plate stops working, the bone may grow more slowly on that side and angle in that direction, or the whole bone may end up shorter than the one on the other side. The risk is higher with type III, IV, and V Salter-Harris fractures, with injuries around the knee, and when treatment is delayed or the bone heals in a poor position. Even then, many children do not develop a noticeable problem, and small differences in length often cause no functional difficulty.

During recovery, families can support healing by keeping the cast clean and dry, following the doctor’s instructions on weight bearing, and attending every follow-up appointment even when the child feels fine. It is helpful to watch for signs such as a new limp, uneven leg lengths, or a limb that seems to angle differently from the other side, and to mention these at check-ups. Most children can return to school quickly, with adjustments for physical education and sports until cleared by the doctor.

Emotional adjustment matters too. Active children may find it frustrating to miss sports. Setting realistic expectations about the timeline and finding safe alternative activities can help. Doctors cannot promise a perfect result, but early diagnosis, appropriate treatment, and consistent follow-up give the best chance of full recovery.

Frequently asked questions

How can I tell if my child has a growth plate fracture or just a sprain?

It is often impossible to tell the difference without a medical examination and, in many cases, an X-ray. Both injuries cause pain and swelling near a joint. Tenderness directly over the end of the bone rather than over the ligaments, and pain that does not settle within a day or two, are features that raise concern for a growth plate injury. In children, doctors tend to treat suspected growth plate fractures cautiously even when X-rays appear normal, because sprains are less common in young children than fractures.

What are the most common growth plate fracture symptoms?

The most frequent symptoms are pain near the end of a bone close to a joint, swelling, warmth, and difficulty using the limb or bearing weight. Some children have a visible deformity, but many do not. A young child may simply stop using an arm or start limping. Because symptoms can be mild in some fracture types, persistent tenderness after an injury should be evaluated rather than assumed to be minor.

What does a Salter-Harris fracture classification mean for my child?

The Salter-Harris system describes which parts of the bone the fracture passes through. Types I and II are the most common and usually heal well with casting. Types III and IV extend into the joint and more often need precise realignment, sometimes with surgery, because both the joint surface and the growth plate are involved. Type V is a crush injury with the highest risk of growth problems. The type helps guide treatment and follow-up, but the child’s age, the bone involved, and how quickly treatment starts also influence the outcome.

What is the usual growth plate fracture treatment?

Most growth plate fractures are treated with a cast or splint for several weeks, sometimes after the doctor gently moves the bone back into position under sedation. Surgery is reserved for fractures that are badly displaced, unstable, or involve the joint surface. Regardless of the initial treatment, follow-up X-rays are used to confirm healing and to check that the bone is growing normally afterward.

How long does a growth plate injury take to heal?

Healing time varies with the bone involved and the child’s age. Many growth plate fractures in the hand or wrist heal in a matter of weeks, while larger bones in the leg may take longer. Younger children generally heal faster than teenagers. Return to full activity usually takes longer than the cast period, because the joint and muscles need time to regain strength. Your doctor will give an estimate based on the specific injury.

Will a growth plate fracture affect how tall my child grows?

In most cases, no. The majority of growth plate fractures heal without affecting growth. A minority result in partial or complete early closure of the growth plate, which can lead to a shorter or angled bone. The risk depends on the fracture type and location. Because this may not be apparent right away, doctors usually monitor the child for at least a year and sometimes until growth is complete. If a problem develops, treatments are available to address it.

Can my child return to sports after a growth plate fracture?

Most children return to their usual sports once the bone has healed and strength and movement have recovered. The timing is decided by the doctor based on examination and imaging, and returning too early may risk re-injury. Some children benefit from a period of guided physical therapy first. Protective equipment and proper technique may help lower the chance of future injury, although no measure removes the risk entirely.

When to see a doctor

Any child who has pain, swelling, or reduced use of a limb after an injury should be seen by a doctor, especially if the pain is located near the end of a bone close to a joint or lasts longer than a day or two. Growth plate fractures are often mistaken for sprains, and early diagnosis helps prevent the bone from healing in a poor position.

Seek urgent or emergency care if you notice any of the following:

• The limb looks bent, crooked, or clearly deformed
• Bone is visible through the skin, or there is an open wound over the injury
• The child cannot move the fingers or toes, or they are numb, tingling, pale, blue, or cold
• Severe pain that is not relieved by rest, elevation, or recommended pain medicine
• The child cannot put any weight on the leg or use the arm at all
• Rapidly increasing swelling or a cast that feels too tight
• Fever, redness, or drainage around a wound or surgical site

After treatment, contact the treating clinic promptly if the cast becomes loose, cracked, or wet, if pain suddenly worsens, or if the child develops a new limp or a limb that seems to be growing differently from the other side during the follow-up period.