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Infected left atrial mass within anatomically normal heart.

A D Malcolm, D M Chaput de Saintonge

    Thorax
    |December 1, 1975
    PubMed
    Summary

    This case study details a unique patient with a left atrial tumor initially suspected as myxoma but found to be organized thrombus with bacterial colonization. Surgical removal successfully treated the condition, highlighting a rare presentation of infective endocarditis.

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    Area of Science:

    • Cardiology
    • Pathology
    • Infectious Diseases

    Background:

    • Presents a complex cardiac case with overlapping features of subacute bacterial endocarditis and left atrial myxoma.
    • Highlights the diagnostic challenges posed by rare cardiac pathologies.

    Observation:

    • A 5x3 cm tumor attached to a normal mitral valve was surgically removed, improving the patient's critical condition.
    • Histological examination revealed the tumor to be organized thrombus with superficial Gram-positive cocci (Streptococcus viridans).

    Findings:

    • The patient's history included neurological disturbances and hypergammaglobulinemia, suggestive of atrial myxoma.
    • Unique aspects include the tumor's valvular attachment, normal cardiac structure, and histopathology with bacterial presence.

    Implications:

    • This case underscores the importance of considering organized thrombus with superimposed infection in the differential diagnosis of cardiac tumors.
    • The findings challenge typical presentations and emphasize the need for thorough histopathological analysis in cardiac mass evaluations.
    • Successful surgical intervention demonstrates a viable treatment strategy for such complex cases.

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