Juvenile Osteochondritis Dissecans (JOCD)
What is Juvenile Osteochondritis Dissecans?
Juvenile Osteochondritis Dissecans is a condition of the joint surfaces and underlying bone that occurs in people who are still growing. Typically seen in children and young people, JOCD is primarily an active youth person’s condition. Changes in the cartilage and underlying bone lead to pain, alterations in movement and ability to compete in their sport. You don’t have to be an athlete to have this condition, although higher levels of activity are considered a risk factor.
Juvenile Osteochondritis Dissecans Stages
There are four general stages of Juvenile Osteochondritis Dissecans
Stage 1: changes or compression of the bone immediately underlying the cartilage (subchondral bone)
Stage 2: partial separation of the subchondral bone, but no movement away from the cartilage
Stage 3: full separation of the bone from the cartilage, again with no separation
Stage 4: full separation of the piece of bone, and it comes away from the remaining bone and floats in the joint cavity
There are a variety of different classification systems for JOCD, but none are widely accepted.
What are the Symptoms of Juvenile Osteochondritis Dissecans?
Each joint in our body has cartilage and subchondral bone, and as such, there are a variety of ways that JOCD presents. Most commonly, Juvenile Osteochondritis Dissecans occurs in the knees (about 95% of cases), hips, ankles, elbows and collarbones, although it may occur in other joints.
Children and young people will complain of:
- Pain, especially during or after activity
- Reduced joint range of motion
- Crepitus (crunchy or popping noises from joints)
What Causes Juvenile Osteochondritis Dissecans?
There are many theories for what causes Juvenile Osteochondritis Dissecans, but it seems to be many various factors coming together to create the ‘perfect storm’ and produce this condition. Over the years, lots of theories have arisen:
- Genetic susceptibility, where there is a history of Osteochondritis Dissecans in the family or other similar joint conditions
- Repeated microtrauma to the area, sporting populations, are at a higher risk.
- Reduced blood supply to the subchondral bone
- Anatomical variations of knee alignment, meniscus types, blood supply
- Biomechanical (movement) inefficiencies due to obesity, reduced strength, impingement etc.
- Uneven bone growth from anatomical variation or growth plate injury
- Joint instability, either structural or dynamic/functional
- Endocrine (hormonal) changes – vitamin D deficiency, human growth hormone deficiency
How is Juvenile Osteochondritis Dissecans Diagnosed?
There aren’t any valid or specific tests to rule in Juvenile Osteochondritis Dissecans. However, physiotherapists can perform a comprehensive examination to rule out all other options. They are looking to include or exclude injuries or conditions to the surrounding tissues, including systemic illnesses that manifest as joint pain. Usually, diagnosis is mainly made by a comprehensive interview to understand your symptoms, backed up by imaging, eg. MRI.
Wilson’s test is one test to examine knees for JOCD, but the reliability and validity of this test are unknown for diagnostic purposes. Wilson’s test may monitor your progression throughout your rehabilitation.
Imaging for Juvenile Osteochondritis Dissecans
If your physiotherapist or GP thinks you might have Juvenile Osteochondritis Dissecans, they will send you for scans. A mix of scans determines if JOCD is present in whichever joint you have pain in, because of the different types of tissues they show.
X-rays are usually taken, from a variety of views. Typically, images are taken from front to back, and the side. Other unique aspects aligned with the natural joint gaps may provide more unobstructed views. These depend on which joint is involved and your doctor, physio and radiologist will be able to determine if any unique views are needed.
MRI is used to view softer tissue involvement, swelling, bone bruising and whether there are any early-stage changes to the joint surface. There is limited use to determine whether any pieces are ‘free-floating’ in the joint space. A combination of X-ray and MRI are routine imaging.
MRI image showing an OCD lesion in a knee (OrthoInfo, 2020)
It is critical that your Juvenile Osteochondritis Dissecans case is discussed with your trusted healthcare professional. Please book an appointment with your trusted physiotherapist or doctor.
Treatment Options for Juvenile Osteochondritis Dissecans
Treatment depends on the nature of the changes inside the joint. Your age and whether their growth plates have finished growing are just some of the factors. Joints that don’t have any undisplaced pieces are typically conservatively treated. Treatment options include physiotherapy, reduced loading and a graduated return to activity.
For Juvenile Osteochondritis Dissecans lesions that have fragments or pieces that may come loose into the joint space, please consult your Orthopaedic surgeon’s opinion. They will determine if bone pieces need to be removed or put back into their original place. This removal or salvaging might need to happen before any exercise therapy to avoid further irritation to the inside of the joint surfaces.
Treatment plans are bespoke to each individual, so your physiotherapist and sports physician will discuss your options with you if you have an OCD lesion found on imaging.
Unloader braces have been put forward in regards to the knee and elbow OCD, to promote healing and maintain movement and independence. Other movement aids like crutches, splints, casts, and different types of bracing are options.
What Results Can You Expect from Juvenile Osteochondritis Dissecans Treatment?
Results vary widely depending on what sort of Juvenile Osteochondritis Dissecans lesion you have, and therefore your treatment.
Pain and swelling management, strengthening, restoration of movement, coordination, and balance retraining are vital components of Juvenile Osteochondritis Dissecans treatment. Treatments focus on returning you to the sport or activity of choice. In the case of no fragment or a fragment that hasn’t moved, conservative treatment commences immediately and typically undergo a 3-6 months trial before deciding if a surgical intervention is needed. If there is a loose fragment, then your surgeon might need to remove this before starting exercise therapy as stated above.
There are no established, widely accepted protocols for conservative treatment. The treatment plans are always bespoke to the person and change over time, depending on their progression. There are some guidelines which help clinicians to guide a return to weight-bearing. These formulate on your clinician’s experience and consensus statements from leaders in the research.
Critical components of rehabilitation base themselves upon a general phased approach. These phases progress under the guidance of your specialist doctors, surgeons, physios and anyone else collaborating on your treatment team. There is no consensus on what factors guide movement between these phases, but radiographic findings and mechanical symptoms impact. Swelling, pain, neuromuscular control, muscle strength and performance, and weight-bearing are all noted influencing factors.
Outcomes vary widely based on the type of surgery you have. Timelines for treatment and recovery of surgical intervention are best sought from your surgeon if you need operative management. Typically, recovery means six weeks on crutches and 6+ months to get back to full function and return to sport. Your healing includes several months of physiotherapy and exercises rehabilitation to restore movement, strength, coordination and balance. The protocol for this rehabilitation is as per conservative management, above.
This type of therapy is in its infancy for OCD. Therefore, it is still too early to determine how effective it is in the long-term. Researchers have trilled it in knees, elbows and ankles. There are, however, early, promising results. Currently, it’s primary use is for those people where surgery has been unsuccessful.
Long Term Outcomes
There is some evidence to suggest that children and young people who suffer from OCD lesions go on to develop osteoarthritis at higher rates than the general population. However, there is a lack of good quality, long-term, well-controlled research. It is challenging to stay just how much of an increased risk there is because a lot of the research doesn’t allow for considerations like other arthritis risk factors, conservative vs non-operative treatment.
There is a research group in the USA called the ROCK group, who are putting together research on Juvenile Osteochondritis Dissecansin the knee. More information will be available when they publish their findings. Their research is ongoing, looking into the different types of surgeries and their outcomes, the long term effects of treatment of JOCD and secondary outcomes/complications.
For more information, Juvenile Osteochondritis Dissecans is a condition that must be discussed with your trusted physiotherapist or doctor.
Common Causes - Knee Pain
Knee pain can have many origins from local injury, referred pain, biomechanical issues and systemic issues. While knee pain can appear simple to the untrained eye, a thorough assessment is often required to ascertain the origin of your symptoms. The good news is that once a definitive diagnosis is determined, most knee pain quickly resolves with the correct treatment and rehabilitation.
Knee Ligament Injuries
- Knee Ligament Injuries
- ACL Injury
- PCL Injury
- MCL Sprain
- LCL Sprain
- Posterolateral Corner Injury
- Superior Tibiofibular Joint Sprain
Knee Meniscus Injuries
- Chondromalacia Patella
- Fat Pad Syndrome
- Patella Dislocation
- Patellofemoral Pain Syndrome
- Osgood Schlatter’s Disease
- Sinding Larsen Johansson Syndrome
Knee Tendon Injuries
- Corked Thigh
- Thigh Muscle Strain
- Hamstring Strain
- ITB Syndrome
- Popliteus Syndrome
- Muscle Strain (Muscle Pain)
- DOMS – Delayed Onset Muscle Soreness
Children’s Knee Conditions
Other Knee-Related Conditions
- Runner’s Knee
- Plica Syndrome
- Stress Fracture
- Overuse Injuries
- Restless Legs Syndrome
For specific information regarding your knee pain, please seek the assistance of a healthcare professional with a particular interest in knee condition, such as your physiotherapist.