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Updated: Jun 4, 2026

Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma
Published on: April 11, 2018
Primary cardiac synovial sarcoma: a case report and literature review
Yuki Yokouchi1, Nobuyuki Hiruta, Toshiaki Oharaseki
1Department of Surgical Pathology Cardiovascular Medicine Cardiovascular Surgery Radiology, Toho University Ohashi Medical Center, Tokyo, Japan. tyuki@med.toho-u.ac.jp
Insights
Primary cardiac synovial sarcoma, a rare cancer, was diagnosed in a 51-year-old man presenting with exercise-induced palpitations. Surgical resection and radiation therapy led to no recurrence at 9 months.
Area of Science:
- Cardiovascular Pathology
- Surgical Oncology
- Molecular Diagnostics
Background:
- Primary cardiac tumors are rare, with synovial sarcoma being an exceptionally uncommon diagnosis.
- Early detection and accurate diagnosis are crucial for effective management of cardiac malignancies.
Observation:
- A 51-year-old male presented with palpitations and dyspnea on exertion.
- Imaging revealed significant bloody pericardial effusion and an intrapericardial tumor.
- Histopathological examination showed spindle-shaped cells, myxoid changes, and a hemangiopericytoma-like vascular pattern.
Findings:
- Immunohistochemistry and SS18-SSX1 fusion transcript detection confirmed a diagnosis of monophasic fibrous type synovial sarcoma.
- Surgical resection of the intrapericardial tumor was successfully performed.
- Postoperative radiation therapy was administered to the patient.
Implications:
- This case highlights the importance of considering rare diagnoses like primary cardiac synovial sarcoma in patients with cardiac symptoms.
- Successful surgical and adjuvant treatment strategies can lead to favorable outcomes.
- Further research into cardiac sarcomas may improve diagnostic and therapeutic approaches.
Abstract:
Primary cardiac synovial sarcoma is a rare disease. A 51-year-old man visited our hospital with the chief complaint of palpitations and shortness of breath while exercising. Copious bloody pericardial effusion and a multicystic intrapericardial tumor were detected. A primary cardiac malignant tumor was suspected, an open-chest tumor resection was performed with the objectives of diagnosis and treatment. Histologically, the tumor cells were uniformly spindle-shaped with an ovoid or oval nucleus, they had proliferated in fascicular fashion. In addition myxoid degeneration, a hemangiopericytomatous vascular pattern and pseudorosette formation were seen in some areas of the tumor. Based on the histopathological and immunohistochemical findings and reverse transcription polymerase chain reaction detection of SS18-SSX1 fusion transcripts, a monophasic fibrous type synovial sarcoma was diagnosed. Postoperative radiation therapy was administered and there had been no recurrence 9 months after the surgery.
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