The piriformis abscess: a case-based review

Area of Science:

• Medical Case Reports
• Infectious Diseases
• Musculoskeletal Disorders

Background:

• Piriformis pyomyositis is a rare condition involving inflammation and infection of the piriformis muscle.
• Literature review focused on case reports to understand clinical presentation, risk factors, and outcomes.

Observation:

• A review of 32 piriformis pyomyositis cases, including 21 with abscesses, revealed common symptoms like fever, gluteal pain, and limited ambulation.
• Elevated inflammatory markers (ESR, CRP) and leukocytosis were frequently observed.
• Staphylococcus aureus was the most common pathogen identified.

Findings:

• No significant association was found between suggested risk factors (gynecologic manipulations, muscle overuse, co-infections) and piriformis abscess formation.
• Piriformis abscess should be considered in patients with gluteal pain, fever, and limited mobility, especially with elevated inflammatory markers.

Implications:

• Early diagnosis using MRI and CT scans is crucial for effective management.
• Timely antibiotic and surgical interventions are essential for achieving full recovery from piriformis pyomyositis and abscess.