Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Intracardiac metastasis of leiomyosarcoma
- Radiologic Findings
- Fig 1. Chest PA shows no active lesion without cardiomegaly.
Fig 2-5. CT scans reveals about 9 x 3.4 x 6.4cm peripherally poorly enhancing (average HU 40), lobulated margin, irregular shape large mass, filling entire RV of the heart. And small polypoid extrusion detected from main mass in RVOT.
Fig 6. PET/CT scans reveals uneven hypermetabolic, large mass involving entire RV
- Brief Review
- Leiomyosarcoma (LMS) is a soft tissue sarcoma that originates from smooth muscle cells. It is commonly found in the uterus but it can occur throughout the body including the retroperitoneal space, abdominal cavity, and any vascular structure. In previous reports, metastatic cardiac tumors were up to 20 times more common than primary tumors and the incidence of cardiac metastatic LMS ranges from 6% to 34% (1).
Patients with metastatic cardiac tumors have new cardiac symptoms such as heart failure, valvular disease, conduction defect, arrhythmias, or syncope. The most common symptom is dyspnea, but it doesn’t suggest cardiac metastasis obviously because the lung metastasis may be seen in many of the patients (2). When evaluating the cardiac metastasis, pericardium should be closely observed as pericardial involvement has been reported in up to 40% of the patients with cardiac metastasis and 15% of cytological examination of pericardial effusion are malignant (3). In previous reports, an intracardiac or pericardial mass was the most specific indicator of cardiac metastasis. The cardiac metastasis is common in the right chamber of the heart, but occurs on the left side when accompanied by lung metastasis.
The prognosis of most cardiac metastases is extremely poor. Previous literatures describe perioperative mortality rate to be 40% and average survival time to be 5 months (2, 3). Radiation therapy is recommended and surgical resection is limited.
- References
- 1. Hallahan DE, Vogelzang NJ, Borow KM, Bostwick DG, Simon MA, Cardiac Metastases From Soft-Tissue Sarcomas, J Clin Oncol. 1986 Nov;4(11):1662-9.
2. Takenaka S, Hashimoto N, Araki N, Hamada K, Naka N, Joyama S et al., Eleven Cases of Cardiac Metastases from Soft-tissue Sarcomas, Jpn J Clin Oncol. 2011 Apr;41(4):514-8
3. Lichtenberger JP 3rd, Reynolds DA, Keung J, Keung E, Carter BW, Metastasis to the Heart: A Radiologic Approach to Diagnosis With Pathologic Correlation, AJR Am J Roentgenol. 2016 Oct;207(4):764-772
- Keywords
- heart, Intracardiac metastasis of leiomyosarcoma,