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[Pyomyositis due to Streptococcus pyogenes in a patient with venolymphatic malformation. Report of one pediatric

Ernestina Sarmiento1, María E Padilla2, Antonela Oyarbide1

  • 1Residencia de Clínica Pediátrica, Hospital de Niños "Dr. Ricardo Gutiérrez", Ciudad Autónoma de Buenos Aires, Argentina.

Archivos Argentinos De Pediatria
|November 24, 2019
PubMed

Insights

Streptococcus pyogenes can cause invasive pyomyositis in children, even in those with underlying conditions like vascular malformations. This case highlights a rare presentation of a serious pediatric infection.

Area of Science:

  • Pediatric infectious diseases
  • Vascular malformations
  • Microbiology

Background:

  • Streptococcus pyogenes is a common pediatric pathogen causing pharyngitis and skin infections.
  • Invasive Streptococcus pyogenes infections, including pyomyositis, are less frequent but carry significant morbidity and mortality (7% in children).
  • Vascular malformations can predispose individuals to infections, though their association with pyomyositis is not well-documented.

Observation:

  • An 11-year-old patient with a subscapular venolymphatic malformation presented with fever and localized pain.
  • The lesion associated with the malformation acutely increased in size.
  • Clinical presentation suggested an infectious process superimposed on the malformation.

Findings:

  • Diagnostic workup confirmed pyomyositis, an infection of the muscle, as the cause of the patient's symptoms.
  • Streptococcus pyogenes was identified as the causative agent.
  • The infection was localized to the area of the venolymphatic malformation.

Implications:

  • This case underscores the importance of considering invasive bacterial infections in pediatric patients with vascular malformations presenting with acute symptoms.
  • Early diagnosis and treatment of Streptococcus pyogenes pyomyositis are crucial to prevent severe complications and reduce mortality.
  • Further research may explore the specific mechanisms by which vascular malformations might increase susceptibility to invasive infections like pyomyositis.

Keywords:
Streptococcus pyogenesbacteremiapyomyositisvascular malformations

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