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Mediastinal Hemangioma Masquerading as a Simple Cyst.

Romina D'Souza1, Prodipto Pal2,3, Binita Chacko1,2

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A mediastinal mass initially appearing as a pericardial cyst in a colon cancer patient was diagnosed as a hemangioma after complications during chemotherapy prompted advanced imaging and surgical removal.

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Area of Science:

  • Oncology
  • Radiology
  • Pathology

Background:

  • Mediastinal masses can present diagnostic challenges, particularly in patients with a history of malignancy.
  • Pericardial cysts are common benign mediastinal lesions, but their appearance can sometimes mimic other pathologies.
  • Colon cancer patients undergoing chemotherapy may develop unexpected complications or secondary findings.

Purpose of the Study:

  • To present a case report of a mediastinal mass in a patient with colon cancer.
  • To illustrate the diagnostic evolution of a mediastinal mass using serial imaging modalities.
  • To highlight the importance of histopathological confirmation for definitive diagnosis.

Main Methods:

  • Initial characterization of the mediastinal mass using chest computed tomography (CT) at baseline and during surveillance.
  • Advanced imaging with chest magnetic resonance imaging (MRI) following complications during chemotherapy.
  • Surgical excision of the mass and subsequent histopathological analysis.

Main Results:

  • The mediastinal mass was initially interpreted as a pericardial cyst on serial CT scans.
  • Chest MRI revealed features necessitating further investigation and intervention.
  • Histopathology confirmed the mass to be a hemangioma, not a pericardial cyst.

Conclusions:

  • Mediastinal masses in cancer patients require careful evaluation, as initial imaging may be misleading.
  • Magnetic resonance imaging can provide crucial additional information for characterizing complex mediastinal lesions.
  • Histopathological diagnosis is essential for definitive characterization and appropriate management of mediastinal masses.