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Updated: Jun 18, 2026
08:46
A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis
Published on: August 12, 2020
Primary pelvic pyomyositis in a neonate.
M Falesi1, B M Regazzoni, M Wyttenbach
1Division of Pediatrics, Ospedale, Mendrisio and Bellinzona, and University of Bern, Switzerland.
Summary
Pyomyositis, a bacterial skeletal muscle infection, is increasingly seen in temperate climates. This case highlights staphylococcal pelvic pyomyositis diagnosed via MRI in a Swiss infant, initially suspected as septic hip osteoarthritis.
Area of Science:
- Medical microbiology
- Infectious diseases
- Musculoskeletal imaging
Background:
- Primary pyomyositis is a bacterial skeletal muscle infection without a clear local cause.
- Classically a tropical disease, pyomyositis is increasingly reported in temperate regions.
- Demographics vary: tropical pyomyositis affects children and young/middle-aged adults, while temperate cases predominantly occur in adults.
Observation:
- A Swiss term-born infant presented with symptoms initially suggestive of septic hip osteoarthritis.
- Magnetic resonance imaging (MRI) was utilized for diagnostic evaluation.
- The imaging revealed staphylococcal pelvic pyomyositis.
Findings:
- The diagnosis of staphylococcal pelvic pyomyositis was confirmed in the infant.
- This case demonstrates pyomyositis occurring in an unexpected demographic and geographic location.
- MRI proved crucial in differentiating pyomyositis from other conditions like septic hip osteoarthritis.
Implications:
- Highlights the expanding geographic range of pyomyositis.
- Emphasizes the importance of considering pyomyositis in infants presenting with hip pain, even in non-tropical regions.
- Underscores the diagnostic utility of advanced imaging like MRI in pediatric musculoskeletal infections.
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