M71.061 Abscess of bursa, right knee

Name of the Condition

• Abscess of bursa, right knee

Summary

An abscess of the bursa, right knee is a localized collection of pus within the bursa of the right knee, a small fluid-filled sac that reduces friction between tissues. This condition typically causes pain, swelling, and warmth at the affected site. The right knee-specific designation indicates the abscess is localized to the bursa in the right knee region.

Causes

Abscesses of the right knee bursa usually result from bacterial infection, often introduced through direct trauma, skin breakdown, or spread from adjacent tissues. Staphylococcus aureus is a common causative organism. Non-infectious causes, such as foreign body reaction or sterile inflammation, are less frequent.

Risk Factors

• Recent injury or surgery near the right knee bursa
• Skin infections or open wounds in the knee area
• Immunocompromised states (e.g., diabetes, HIV)
• Chronic inflammatory conditions (e.g., rheumatoid arthritis)
• Repetitive motion or pressure on the right knee bursa

Symptoms

• Localized pain, tenderness, or throbbing in the right knee
• Swelling, redness, or warmth over the bursa
• Limited range of motion in the right knee joint
• Possible fever or systemic signs if infection spreads
• Pus drainage if the abscess ruptures

Diagnosis

Diagnosis involves a physical examination to assess bursal swelling, warmth, and tenderness. Imaging (e.g., ultrasound) may confirm fluid collection. Aspiration of the bursa can identify purulent material and guide culture for organism identification.

Treatment Options

Treatment typically includes antibiotic therapy to address infection, often targeting Staphylococcus aureus. Drainage of the abscess may be necessary for larger or persistent collections. Rest, elevation, and anti-inflammatory measures can help reduce symptoms. Surgical intervention may be required for refractory cases.

Prognosis and Follow-Up

With appropriate treatment, most cases resolve without long-term complications. Follow-up may involve monitoring for recurrence or residual symptoms. Physical therapy may be recommended to restore function if mobility is impaired.

Complications

Untreated abscesses can lead to spread of infection, sepsis, or damage to surrounding tissues. Chronic inflammation or scarring may result in persistent pain or limited joint mobility.

Lifestyle & Prevention

Avoiding trauma to the knee, maintaining skin integrity, and managing chronic conditions can reduce risk. Proper wound care and prompt treatment of infections near the knee may prevent bursal involvement.

When to Seek Professional Help

Seek care if symptoms worsen, fever develops, or pus drainage occurs. Persistent pain, swelling, or limited mobility despite home care warrants medical evaluation.

Tips for Medical Coders

Document the specific location (right knee) and confirm the presence of an abscess. Ensure clinical documentation supports the diagnosis and any associated procedures, such as drainage or antibiotic therapy.