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Extraskeletal Osteosarcoma of Mediastinal Origin.
Xinran Huang1, Qingchao Meng1, Bin Lu1
1Department of Radiology, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Bei-Li-Shi Street, Beijing 100037, China.
Radiology. Cardiothoracic Imaging
|March 19, 2026
Summary
Mediastinal extraskeletal osteosarcoma (ESOS) involving the heart is rare and aggressive. This case highlights diagnostic and treatment challenges for this cardiac oncology.
Area of Science:
- Cardiovascular Oncology
- Thoracic Surgery
- Medical Imaging
Background:
- Mediastinal extraskeletal osteosarcoma (ESOS) with cardiac involvement is exceptionally rare and aggressive.
- Early diagnosis and management are crucial for improving patient outcomes.
Purpose of the Study:
- To present a rare case of mediastinal ESOS with cardiac involvement.
- To discuss the diagnostic and therapeutic challenges associated with this malignancy.
Main Methods:
- A 56-year-old male presented with chest tightness and dyspnea.
- Multimodality imaging revealed a large pericardial mass compressing the right atrium.
- Surgical resection followed by histopathology confirmed high-grade ESOS.
Main Results:
- The patient received adjuvant radiation therapy and chemotherapy.
- Pulmonary metastases were detected at 6 months, necessitating treatment adjustment.
- The patient remained clinically stable at 11-month follow-up.
Conclusions:
- This case highlights the importance of multimodality imaging in diagnosing rare cardiac malignancies.
- Effective management requires a multidisciplinary approach addressing the diagnostic and therapeutic challenges of ESOS.
