Group B streptococcal endocarditis mimicking mitral valve myxoma

Area of Science:

• Cardiology
• Infectious Diseases
• Pathology

Background:

• Group B Streptococcus (GBS) is a common cause of neonatal infections but can also cause severe infections in adults, including endocarditis.
• Endocarditis, an infection of the heart valves, can lead to the formation of vegetations, which are clumps of bacteria, fibrin, and cellular debris.
• Cardiac tumors, such as myxomas, can present with similar imaging findings to endocardial vegetations, posing a diagnostic challenge.

Observation:

• A case of a patient presenting with large vegetations on the mitral valve is described.
• The vegetations were large and morphologically resembled a myxoma, a common type of cardiac tumor.
• Infectious endocarditis caused by Group B Streptococcus was diagnosed.

Findings:

• The study describes a rare presentation of Group B streptococcal endocarditis.
• The large vegetations associated with GBS endocarditis mimicked a mitral valve myxoma on initial assessment.
• Microbiological and pathological findings confirmed the diagnosis of infectious endocarditis.

Implications:

• This case underscores the need to include infectious etiologies, specifically Group B streptococcal endocarditis, in the differential diagnosis of mitral valve masses.
• Accurate differentiation between infectious vegetations and primary cardiac tumors is crucial for appropriate patient management and treatment.
• Early diagnosis and treatment of GBS endocarditis are essential to prevent complications such as valve destruction, heart failure, and systemic embolization.