Idiopathic giant cell myocarditis in a newborn: case report

Area of Science:

• Pediatric Pathology
• Cardiovascular Pathology
• Infant Mortality

Background:

• Idiopathic giant cell myocarditis (IGCM) is a rare condition affecting children, often leading to sudden death.
• The exact cause of IGCM remains unknown.
• Diagnosis typically relies on endomyocardial biopsy and histological analysis.

Observation:

• A one-month-old infant with no prior medical history died suddenly during breastfeeding.
• Autopsy and drug screening did not reveal the cause of death.
• Histological examination of cardiac tissue showed widespread necrosis, inflammation, fibroblastic proliferation, and multinucleated giant cells, without granulomas.

Findings:

• The histological findings were consistent with idiopathic giant cell myocarditis.
• The case highlights that IGCM can affect infants and be a cause of sudden unexpected death in infancy.
• Multinucleated giant cells and necrosis were key diagnostic features in the absence of granulomas.

Implications:

• This case underscores the importance of considering IGCM in the differential diagnosis of sudden infant death.
• Histopathological examination of cardiac tissue is crucial for diagnosing IGCM in infants.
• Further research into the etiology of IGCM is needed to prevent infant mortality.