Freiberg Disease

Freiberg’s Disease, also known as Freiberg Infraction, is a condition affecting the head of a metatarsal bone in the forefoot. It most commonly involves the second metatarsal and occurs when the bone’s blood supply becomes disrupted, resulting in avascular necrosis, weakening, and eventual collapse of the metatarsal head. Damage to the overlying cartilage can lead to stiffness, loss of joint motion, and arthritis of the metatarsophalangeal joint.

Freiberg’s Disease is uncommon but occurs most often in adolescents and young adults, particularly females. Early recognition and treatment can help relieve pain, protect the joint surface, and prevent progression to permanent deformity and arthritis.

Causes

The exact cause of Freiberg’s Disease is not completely understood. It is believed to result from a combination of repetitive mechanical stress and factors that affect the blood supply to the metatarsal head.

Repetitive microtrauma from activities such as running, dancing, and sports can place excessive stress on the forefoot. A long second metatarsal can increase pressure across the second MTP joint, making it particularly vulnerable. Other structural factors, including certain foot shapes and high arches, may also contribute to abnormal loading.

The process begins with injury and compromised blood flow within the metatarsal head. As the bone loses its ability to maintain normal strength, the supporting bone beneath the cartilage can collapse. This changes the shape of the joint and may eventually cause cartilage damage and degenerative arthritis.

Anatomy

The metatarsal heads are located at the front of the foot and form the MTP joints at the bases of the toes. These joints are essential for walking, balance, and pushing off during each step.

The second metatarsal head is particularly susceptible to repetitive loading because of its position and its role in transferring weight through the forefoot. A healthy blood supply helps maintain the strength of the bone and the health of the cartilage covering the joint. When blood flow is disrupted, the metatarsal head can weaken, flatten, and lose its normal shape.

Symptoms

Freiberg’s Disease typically develops gradually rather than after a single traumatic event. Pain is usually felt in the ball of the foot and may become more noticeable with walking, running, or other activities that place pressure on the forefoot.

Common symptoms include:

·   Pain and tenderness around the affected MTP joint

·   Swelling in the forefoot

·   Stiffness and reduced joint motion

·   Pain with walking or athletic activities

·   Difficulty wearing high heels or narrow shoes

·   Tenderness over the top of the affected joint

·   A sensation of pressure or feeling as though there is a hard object beneath the forefoot

As the condition progresses, collapse and deformity of the metatarsal head can lead to persistent stiffness and arthritis. In advanced cases, associated toe deformities such as a hammertoe or crossover toe may develop.

Diagnosis and Imaging

Diagnosis begins with a medical history and physical examination. We evaluate the location of pain, tenderness, swelling, range of motion, foot structure, and symptoms during weight-bearing.

X-rays are usually the first imaging study. Early disease may show subtle changes, while more advanced disease can demonstrate flattening, sclerosis, fragmentation, or collapse of the metatarsal head and changes in the joint space.

MRI can identify early abnormalities within the bone and surrounding cartilage before significant collapse becomes visible on X-rays. Advanced imaging may be useful when the diagnosis is uncertain or when the extent of bone and cartilage damage needs to be evaluated for treatment planning.

Nonsurgical Treatment

Treatment depends on the stage of disease, severity of symptoms, age, activity level, and condition of the joint.

Early-stage Freiberg’s Disease can often be managed successfully with nonsurgical treatment. The primary goals are to reduce pressure on the metatarsal head, control symptoms, and allow the affected bone and joint to recover.

Treatment may include:

·   Activity modification: Temporarily reducing running, jumping, and other high-impact activities decreases stress on the affected joint.

·   Footwear modification: Stiff-soled or rocker-bottom shoes can reduce pressure and motion through the MTP joint. Shoes with a wide toe box can also improve comfort.

·   Orthotics: Custom or prefabricated orthotics, including metatarsal pads or bars, can redistribute pressure away from the affected metatarsal head.

·   Immobilization: A walking boot or cast may be recommended for a period of time when symptoms are significant.

·   Medication: Anti-inflammatory medications may help reduce pain and swelling when medically appropriate.

·   Low-impact activity: Swimming, cycling, and other activities that place less stress on the forefoot can help maintain conditioning during recovery.

Early treatment offers the best opportunity to control symptoms and prevent progression.

Surgical Treatment

Surgery may be recommended when pain persists despite appropriate nonsurgical treatment or when the disease has progressed to significant structural damage. The procedure is selected based on the condition of the metatarsal head and cartilage, disease stage, age, and activity requirements.

Joint-preserving procedures may include:

·   Core decompression: Small channels are created in the affected bone to reduce pressure and stimulate healing.

·   Debridement: Damaged cartilage, loose fragments, or bone spurs are removed from the joint.

·   Osteotomy: The metatarsal is reshaped or repositioned to decrease pressure on the damaged portion of the joint and improve joint mechanics.

·   Osteochondral grafting: Healthy bone and cartilage are transferred to restore a damaged portion of the metatarsal head in selected patients.

Advanced disease with extensive arthritis or joint destruction may require reconstructive procedures such as interposition arthroplasty, implant arthroplasty, or fusion in carefully selected cases.

Recovery and Rehab

Recovery varies according to disease severity and the procedure performed. Patients treated without surgery generally improve over several weeks to months with activity modification, appropriate footwear, and pressure-relieving orthotics.

After surgery, patients may initially require a postoperative shoe, walking boot, or cast. Weight-bearing restrictions depend on the specific procedure and are gradually advanced as healing progresses. Physical therapy may be used to restore joint motion, strength, balance, and walking mechanics.

Many patients experience substantial improvement within three to six months, although recovery can be longer for advanced disease or extensive reconstruction. Some residual stiffness may remain, particularly when arthritis was present before surgery.

 Potential Complications

Untreated or advanced Freiberg’s Disease can result in permanent collapse of the metatarsal head, chronic pain, stiffness, and arthritis. Following treatment, potential complications include persistent pain, limited joint motion, recurrent or residual deformity, and transfer metatarsalgia affecting adjacent metatarsals.

The risk of long-term joint degeneration is generally greater when Freiberg’s Disease is diagnosed after significant collapse has already occurred.

Long-Term Outlook

The prognosis depends largely on the stage at diagnosis. Early-stage disease generally has a more favorable outcome because the metatarsal head and joint surface have not yet undergone substantial structural damage. Advanced disease may require surgery to restore function and relieve pain.

Proper footwear, activity modification, pressure-relieving orthotics, and regular follow-up can help protect the affected joint. Patients should seek evaluation when persistent forefoot pain develops, particularly when symptoms occur during walking or athletic activity. Early assessment allows us to identify Freiberg’s Disease before significant collapse or arthritis develops.

When to See a Specialist

Persistent pain or swelling in the ball of the foot should be evaluated, especially when symptoms interfere with walking, exercise, or footwear. Early diagnosis can help prevent progression and may allow treatment with nonsurgical measures.

A foot and ankle specialist can evaluate the underlying cause of forefoot pain and determine whether Freiberg’s Disease, a stress injury, metatarsalgia, Morton’s neuroma, or another condition is responsible. Treatment is tailored to the stage of disease and the individual’s functional needs.

At Complete Orthopedics, our doctors provide comprehensive evaluation and treatment for Freiberg’s Disease, with an emphasis on preserving the joint and restoring comfortable function whenever possible.