M46.35 Infection of intervertebral disc (pyogenic), thoracolumbar region

Name of the Condition

• Infection of Intervertebral Disc (Pyogenic), Thoracolumbar Region

Summary

Infection of the intervertebral disc (pyogenic), thoracolumbar region, is a bacterial infection affecting the intervertebral disc and adjacent structures in the thoracic and lumbar spine. This condition involves inflammation and infection of the disc space, potentially leading to pain, structural damage, and systemic symptoms. It requires prompt medical attention to prevent complications.

Causes

Pyogenic disc infection in the thoracolumbar region is typically caused by bacterial pathogens, such as Staphylococcus aureus or Streptococcus species. The infection may enter the disc space through hematogenous spread (via the bloodstream) or direct inoculation, often following trauma, surgery, or invasive procedures. The inflammatory response can result in disc destruction and spread to surrounding tissues.

Risk Factors

• Recent spinal surgery or invasive procedures in the thoracolumbar region.
• Immunocompromised states (e.g., diabetes, HIV, or chronic steroid use).
• Intravenous drug use.
• Pre-existing spinal conditions or trauma affecting the thoracolumbar area.
• Advanced age.

Symptoms

• Severe, localized back pain that worsens with movement.
• Fever, chills, or other systemic signs of infection.
• Reduced spinal mobility or stiffness.
• Possible radiating pain to the limbs if nerve roots are involved.
• In some cases, visible swelling or tenderness over the affected area.

Diagnosis

Diagnosis is based on clinical evaluation, imaging (e.g., MRI or CT), and laboratory tests. Imaging helps identify disc space infection and adjacent tissue involvement, while blood or tissue cultures confirm the bacterial cause. Clinical correlation with symptoms and risk factors is essential.

Treatment Options

Treatment typically involves antibiotics targeted at the identified pathogen, often administered intravenously initially. Surgical intervention may be necessary to drain abscesses or stabilize the spine if structural damage occurs. Pain management and physical therapy support recovery.

Prognosis and Follow-Up

Prognosis depends on early diagnosis and treatment. With prompt intervention, many patients recover fully, but delayed care can lead to chronic pain or spinal instability. Follow-up includes monitoring for recurrence and assessing spinal function.

Complications

• Spinal instability or deformity.
• Chronic pain or disability.
• Spread of infection to adjacent tissues or bloodstream (sepsis).
• Neurological deficits, such as weakness or numbness.

Lifestyle & Prevention

• Maintain good spinal health through regular exercise and proper posture.
• Avoid invasive spinal procedures unless medically necessary.
• Manage chronic conditions (e.g., diabetes) to reduce infection risk.
• Seek prompt treatment for spinal injuries or infections.

When to Seek Professional Help

Consult a healthcare provider if you experience severe back pain, fever, or signs of infection, especially if you have risk factors like recent surgery or immunocompromise. Immediate care is critical to prevent complications.

Tips for Medical Coders

Use code M46.35 for pyogenic intervertebral disc infection specifically in the thoracolumbar region. Document the anatomical location and confirm the infection is pyogenic (bacterial) to support coding accuracy. Include details on diagnostic methods and treatment to ensure comprehensive coding.