M71.3 Other bursal cyst

Name of the Condition

• Other bursal cyst

Summary

An other bursal cyst is a fluid-filled sac that forms in or around a bursa, a small lubricating structure that reduces friction between tissues. These cysts are non-cancerous and typically result from irritation, inflammation, or structural changes in the bursa, leading to localized swelling or discomfort.

Causes

Other bursal cysts can develop due to repetitive motion, direct trauma, or underlying inflammatory conditions affecting the bursa. They may also arise from degenerative processes or mechanical stress on the bursal tissue.

Risk Factors

• Repetitive or prolonged pressure on bursae (e.g., from kneeling, leaning)
• Occupational or athletic activities involving repetitive joint use
• Pre-existing inflammatory conditions (e.g., arthritis)
• Recent injury or surgery near a bursa
• Age-related degenerative changes

Symptoms

• Swelling or a visible lump at the affected site
• Pain or tenderness, especially with movement or pressure
• Limited range of motion in adjacent joints
• Discomfort or stiffness in the area

Diagnosis

Diagnosis typically involves a physical examination to assess cyst characteristics, along with imaging (e.g., ultrasound or MRI) to evaluate tissue changes. Fluid aspiration may be performed if diagnosis is uncertain.

Treatment Options

• Observation for cysts causing no significant symptoms
• Aspiration to drain the fluid and reduce swelling
• Corticosteroid injections to reduce inflammation
• Surgical removal for persistent, painful, or recurrent cysts

Prognosis and Follow-Up

Most bursal cysts resolve with conservative treatment, though recurrence is possible. Follow-up may involve monitoring for symptom changes or repeat imaging if the cyst persists or worsens.

Complications

• Recurrence after treatment
• Infection if the cyst ruptures or is aspirated
• Persistent pain or functional impairment if left untreated

Lifestyle & Prevention

• Avoid repetitive motions or prolonged pressure on affected areas
• Use ergonomic supports during activities
• Maintain joint flexibility through gentle exercise
• Address underlying inflammatory conditions promptly

When to Seek Professional Help

Seek care if the cyst causes severe pain, limits movement, shows signs of infection (e.g., redness, warmth), or grows rapidly.

Tips for Medical Coders

Document the location and characteristics of the bursal cyst, as well as any contributing factors (e.g., trauma, inflammation). Ensure the diagnosis aligns with the clinical findings and supports the use of code M71.3.