M89.13 Physeal arrest, forearm

Name of the Condition

• Physeal arrest, forearm

Summary

Physeal arrest of the forearm refers to the premature cessation of growth at the growth plate (physis) of the forearm bones (radius and/or ulna), which can disrupt normal skeletal development. This condition may lead to limb length discrepancies or angular deformities, depending on the affected bone and the timing of arrest.

Causes

Physeal arrest of the forearm can result from trauma, infection, radiation therapy, or certain medical conditions that damage the growth plate. It may also occur as a complication of orthopedic procedures or due to genetic disorders affecting bone growth.

Risk Factors

• Trauma to the growth plate, such as fractures or dislocations
• Infections (e.g., osteomyelitis) involving the growth plate
• Radiation therapy near the growth plate
• Underlying conditions like rickets or skeletal dysplasias
• Prior orthopedic surgeries involving the growth plate

Symptoms

• Limb length inequality
• Angular deformities (e.g., bowing or angulation of the affected limb)
• Asymmetrical growth between limbs
• Pain or swelling at the affected growth plate
• Functional limitations due to deformity

Diagnosis

Diagnosis involves a physical examination to assess limb alignment and growth. Imaging studies, such as X-rays or MRI, are used to evaluate the growth plate and detect signs of arrest. Comparison of limb lengths and serial imaging may be necessary to confirm the diagnosis and assess progression.

Treatment Options

Treatment depends on the severity and impact of the arrest. Options may include observation for mild cases, orthopedic interventions like limb lengthening or angular correction, or surgical procedures to address deformities. Physical therapy may be recommended to improve function.

Prognosis and Follow-Up

Prognosis varies based on the extent of growth plate damage and the timing of intervention. Early diagnosis and appropriate management can improve outcomes, but residual deformities or functional limitations may persist. Regular follow-up with an orthopedic specialist is typically recommended to monitor growth and adjust treatment as needed.

Complications

Potential complications include persistent limb length discrepancy, angular deformity, joint stiffness, or functional impairment. Untreated or severe cases may lead to chronic pain or difficulty with daily activities.

Lifestyle & Prevention

Preventive measures focus on avoiding trauma to the forearm, prompt treatment of infections, and careful management of conditions affecting bone growth. Protective equipment during activities and adherence to medical advice for underlying conditions may reduce risk.

When to Seek Professional Help

Seek medical attention if limb asymmetry, pain, or functional changes are noticed, especially in children or adolescents. Early evaluation by a healthcare provider can help determine the cause and appropriate management.

Tips for Medical Coders

Document the specific forearm bone(s) affected (radius, ulna, or both) and whether the arrest is partial or complete. Include details on etiology (e.g., trauma, infection) and clinical findings to support code assignment. Ensure documentation aligns with the clinical context of physeal arrest in the forearm.