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Arthritis caused by Cryptococcus neoformans infection: A case report
Juan Min1, Ying Zhao2, Jie Du1
1Microbiology Laboratory, Guang'anmen Hospital (Baoding), China Academy of Chinese Medical Sciences, Baoding, Hebei 071000, P.R. China.
Biomedical Reports
|January 15, 2024
Summary
This study reports a rare case of knee joint infection caused by Cryptococcus neoformans in an immunocompetent patient. Prompt diagnosis and treatment led to significant improvement, highlighting the need for clinical awareness.
Area of Science:
- Infectious Diseases
- Mycology
- Rheumatology
Background:
- Cryptococcal infections typically affect the lungs and central nervous system, rarely involving bone and joint areas, especially in immunocompetent individuals.
- The incidence of extraneural cryptococcosis is low, making diagnosis challenging without specific clinical suspicion.
Observation:
- A 56-year-old male presented with severe anemia and lung inflammation, later developing painful, swollen knee joints without initial obvious cause.
- Diagnostic workup, including pus culture and cryptococcal antigen testing, confirmed Cryptococcus neoformans as the causative agent of the knee joint infection.
Findings:
- The patient's knee joint infection was successfully treated with pus drainage and fluconazole, resulting in substantial clinical improvement.
- This case underscores the potential for Cryptococcus neoformans to cause osteoarticular infections even in the absence of significant immunosuppression.
Implications:
- Increased clinical awareness of Cryptococcus neoformans osteoarticular infections is crucial for timely diagnosis and management.
- Early pathogen identification through fluid or tissue analysis is essential to prevent misdiagnosis and severe outcomes associated with delayed treatment of cryptococcal infections.
