Lemierre's Syndrome Presenting as Multifocal Pyomyositis in a Young Child.

Area of Science:

• Pediatric Infectious Diseases
• Bacteriology
• Musculoskeletal Infections

Background:

• Lemierre's syndrome, characterized by oropharyngeal infection followed by thrombophlebitis of the internal jugular vein and sepsis, is predominantly diagnosed in young adults.
• Multifocal pyomyositis, a bacterial infection of the muscles, is exceptionally rare in pediatric populations, particularly when presenting without a clear preceding infection.

Observation:

• A case of multifocal pyomyositis in a young child is presented.
• The causative agent identified was Fusobacterium species, an unusual pathogen for pyomyositis in this age group.
• The patient's presentation was atypical, lacking the typical pharyngitis often associated with Lemierre's syndrome.

Findings:

• This report details a rare instance of multifocal pyomyositis in a young child.
• Fusobacterium species were identified as the causative agent, challenging the typical microbial profile for pediatric pyomyositis.
• The case underscores the possibility of Fusobacterium-induced pyomyositis in children with unexplained multifocal muscle abscesses.

Implications:

• The findings suggest that Fusobacterium should be included in the differential diagnosis for pediatric multifocal pyomyositis, especially in cases with unclear etiology.
• This case expands the known spectrum of disease caused by Fusobacterium in children.
• Clinicians should consider broader microbiological investigations for pediatric pyomyositis, including anaerobic pathogens like Fusobacterium.