[Multidisciplinary approach in pyomyositis early diagnosis]

Area of Science:

• Medical Imaging
• Infectious Diseases
• Musculoskeletal Pathology

Background:

• Pyomyositis is a rare bacterial infection of skeletal muscle, often affecting the lower limbs and thorax.
• Its incidence is rising, particularly in immunocompromised individuals (e.g., advanced AIDS) and those with comorbidities (diabetes, cancer) or on long-term corticosteroids.
• The condition presents diagnostic challenges, necessitating advanced imaging for accurate assessment.

Observation:

• A 46-year-old female presented with symptoms requiring extensive differential diagnosis.
• Magnetic Resonance Imaging (MRI), utilizing specific T2 and T1 weighted sequences with fat saturation, proved instrumental.
• The MRI protocol successfully identified the presence and extent of a primary muscle abscess.

Findings:

• The case demonstrated a primary pyomyositis, aligning with Anglo-Saxon literature, rather than a secondary infection as suggested by French literature.
• The comprehensive MRI protocol facilitated accurate diagnosis and guided efficient surgical drainage of the muscle abscess.
• Post-operative MRI confirmed the successful drainage and resolution of the abscess.

Implications:

• This case underscores the critical role of advanced imaging, specifically MRI, in the diagnosis and management of pyomyositis.
• It emphasizes the importance of interdisciplinary collaboration in managing complex cases of infectious musculoskeletal pathology.
• The findings support the recognition of primary pyomyositis as a distinct entity, crucial for appropriate treatment strategies.