Primary right atrium angiosarcoma mimicking pericarditis
© Kontogiorgi et al; licensee BioMed Central Ltd. 2007
Received: 24 January 2007
Accepted: 22 October 2007
Published: 22 October 2007
Primary cardiac neoplasms occur rarely and most of them are benign. Malignant tumors including angiosarcoma are extremely rare and have a non specific clinical presentation and a poor prognosis.
We present a case of a young male who was transferred to our hospital because of shock and multiple organ failure after a complicated pericardial biopsy. During the previous seven months he presented with recurrent episodes of pericardial effusions and tamponade. Chest computed tomography revealed a mass in the right atrium, infiltrating the myocardium and pericardium. During emergency surgery that followed, the patient died because of uncontrolled hemorrhage. Autopsy revealed the mass of the right atrium, which was identified on histological examination as primary cardiac angiosarcoma.
This case highlights the difficulties both in early diagnosis and in the management of patients with cardiac angiosarcoma.
Primary tumors of the heart are extremely rare and the majority of them are benign [1–7]. Angiosarcoma is the most common primary malignant tumor in adults. It is a highly aggressive tumor characterized by a predilection in the right side of the heart, a short clinical course and a fatal outcome. Because of nonspecific clinical presentation early diagnosis is difficult. We report a case of right atrial angiosarcoma that presented with recurrent pericardial effusions and cardiac tamponade.
A 29-year-old male patient was transferred to our Intensive Care Unit (ICU) from another hospital, because of shock and multiple organ failure after a complicated pericardial biopsy. Seven months before, after a syncopal episode, he had been diagnosed with cardiac tamponade diagnosed by a transthoracic echocardiogram (TEE). Subxiphoidal drainage of 700 ml hemorrhagic fluid was performed resulting in hemodynamic stabilization. Cytologic examination of the fluid was negative for malignancy. Pericarditis was diagnosed caused by chlamydia; azithromycin and anti-inflammatory drugs were administered. For the next four months the patient was relatively well except for complain of easy fatigue. From that point on, he gradually presented dyspnea on exertion, along with pain in the back and spinal column. He also had two syncopal episodes. A new TTE showed recurrence of the pericardial effusion. Chest computed tomography (CT) scan disclosed a confluent mass of the heart with myocardial and pericardial infiltration. Thoracotomy and biopsy was then decided. Trauma of the cardiac cavity occurred intraoperatively, followed by hypovolemic shock and two episodes of cardiac arrest. Subsequently, he was transferred to our tertiary hospital for further cardiosurgical treatment.
Primary tumors of the heart are rare with an incidence ranging from 0.0017% to 0.0033% in reported autopsy series and the majority of them are benign . Angiosarcoma is the most common primary cardiac malignant tumor and is extremely rare. It is seen more commonly to males than females, usually between the third and fifth decade of life [1–5].
The location of cardiac tumors varies by the type of tumor . Malignant tumors are located mainly in the right side of the heart; ninety percent of angiosarcomas are located in the right atrium and there is a high proportion of pericardial involvement [5, 6]. This predilection for the right heart often leads to right-sided congestive heart failure, superior vena cava obstruction and pericardial effusion. Typically in our case the tumor was located in the right atrium and presented as pericarditis. Presenting symptoms are not specific and include dyspnea, chest pain, cough, hemoptysis, syncope, and cardiac arrhythmias. The atypical clinical presentation, the rareness and the rapidly evolving nature of this malignancy, are responsible, at least in part, for the late diagnosis in almost all reported cases.
Imagine techniques have an important role in early diagnosis. TTE and especially, transesophageal echocardiography (TEE), can precisely locate the tumor, define its extent, and may accurately predict tumor type [6, 7]. Some patients of course, as in the present case, have negative initial echocardiographic findings either because the tumor is too small or its location on the posterior surface of the myocardium prevents accurate assessment . However, since recurrent pericardial effusion is a common clinical feature of cardiac angiosarcoma and pericardial constriction can occur as in a recently reported case , echocardiography is of great importance in differential diagnosis of an effusing-constrictive pericarditis.
CT and MRI have excellent diagnostic advantages with regard to tumor delineation and spread . More specifically, MRI currently appears to be the imaging modality of choice in the assessment of a patient with known cardiac mass . Although CT was thought to be less useful in cardiac tumors in the past , the current generation of 16 and 64-slice multidetector CT does allow gating to the cardiac cycle, being a valuable tool.
The main treatment strategy in cardiac angiosarcoma is surgical resection with or without chemotherapy and radiation. However, regardless of treatment, prognosis is poor with survival ranging from 6 to 12 months. Novel approaches, such as the use of interleukin-2, have been reported to be effective. In a case of cardiac angiosarcoma treated with a combination of chemotherapy and immunotherapy, survival of 30 months after surgery has been reported .
Given the rarity of this fatal condition and the lack of a specific clinical presentation, the diagnosis of cardiac angiosarcoma requires a high degree of suspicion. Early diagnosis may facilitate the management of these patients.
Written consent was obtained from the patient for publication of this case report.
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