Septic Infrapatellar Bursitis in an Immunocompromised Female

Area of Science:

• Orthopedics
• Infectious Diseases
• Rheumatology

Background:

• Septic bursitis is commonly caused by Staphylococcus aureus, often affecting the olecranon and prepatellar bursae in men with preceding trauma.
• Atypical presentations of septic bursitis are less common but important to recognize for effective treatment.

Observation:

• An 86-year-old female presented with atypical septic bursitis of the infrapatellar bursa.
• This presentation was unusual due to the patient's sex, lack of preceding trauma, and the identification of Pseudomonas aeruginosa.

Findings:

• Diagnostic workup involved imaging modalities and joint aspiration.
• The patient received intravenous antibiotics, leading to full resolution of the septic bursitis.

Implications:

• This case expands the understanding of septic bursitis, particularly concerning rare locations and causative organisms.
• It underscores the importance of considering atypical presentations and pathogens in diagnosing septic bursitis.
• The successful treatment highlights the efficacy of prompt diagnosis and appropriate antibiotic therapy.