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Primary mediastinal large B-cell lymphoma mimicking liposarcoma
C T Huang1, W C Huang, J Y Shih
1Department of Internal Medicine, Division of Pulmonary Medicine, National Taiwan University Hospital, No. 7, Chung-Shan South Rd, Taipei 100, Taiwan.
Medical Oncology (Northwood, London, England)
|December 11, 2007
Summary
This case report describes a rare instance of lymphoma infiltrating mediastinal adipose tissue, initially misdiagnosed as liposarcoma. This finding highlights the importance of histopathology in diagnosing mediastinal masses.
Area of Science:
- Oncology
- Pathology
- Radiology
Background:
- Mediastinal masses can present diagnostic challenges, with imaging characteristics sometimes mimicking other pathologies.
- Chronic obstructive pulmonary disease (COPD) exacerbations can lead to incidental findings on chest imaging.
Observation:
- An elderly male patient with COPD exacerbation incidentally found to have an anterior mediastinal mass on chest radiograph.
- Chest CT revealed a fat-containing mediastinal mass with a solid component, initially suggesting liposarcoma.
Findings:
- Histopathologic examination of the excised mass revealed lymphoma infiltrating mediastinal adipose tissue, not liposarcoma.
- This represents the first reported case of lymphomatous growth within mediastinal lipomatosis.
Implications:
- Accurate histopathological diagnosis is crucial for effective treatment of mediastinal tumors.
- This case expands the differential diagnosis for fat-containing mediastinal masses, emphasizing the need to consider lymphoid infiltration.