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An unusual tumour: Hamartoma of mature cardiac myocytes

Julio Cesar Mantilla-Hernández1, Julián Amaya-Mujica2, Olga Mercedes Alvarez-Ojeda1

  • 1Department of Pathology, Universidad Industrial de Santander, Bucaramanga, Colombia.

Revista Espanola De Patologia : Publicacion Oficial De La Sociedad Espanola De Anatomia Patologica Y De La Sociedad Espanola De Citologia
|December 26, 2018
PubMed

Insights

This study details a rare cardiac hamartoma, a benign heart tumor composed of mature cardiac myocytes and other cells. The findings highlight unique immunohistochemical markers for diagnosing this unusual cardiac neoplasm.

Area of Science:

  • Cardiovascular Pathology
  • Surgical Pathology
  • Tumor Biology

Background:

  • Heart neoplasms are rare, with most being benign.
  • Cardiac hamartomas, composed of mature cardiac myocytes, are exceptionally uncommon.
  • Distinguishing cardiac hamartomas from other cardiac tumors is crucial for accurate diagnosis.

Observation:

  • A multi-lobulated, polypoid tumor was identified in the right atrium during autopsy.
  • Microscopic examination revealed a heterogeneous mixture of cardiomyocytes, fibrous connective tissue, and adipocytes.
  • Immunohistochemical analysis showed positive staining for desmin, muscle-specific actin (HHF-35), and CD34.

Findings:

  • The tumor was characterized as a hamartoma of mature cardiac myocytes.
  • The specific combination of immunohistochemical markers (desmin, HHF-35, CD34) provides diagnostic utility.
  • Histological and clinical features differentiated it from cardiac rhabdomyoma and myxoma.

Implications:

  • This case expands the understanding of rare cardiac neoplasms.
  • The identified immunohistochemical profile aids in the diagnosis of cardiac hamartomas.
  • Accurate diagnosis of cardiac hamartomas is essential for appropriate patient management and prognosis.

Keywords:
AutopsiaAutopsyCardiac myocytesHamartomaHeart neoplasmsImmunohistochemistryInmunohistoquímicaMiocitos cardiacosNeoplasias cardiacas

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