Cardiac fibromas in adult patients –a case series focusing on rhythmology and radiographic features

Fibromas are rare primary benign cardiac tumors which can become symptomatic due to expansive growth, ventricular rhythm disturbances, and sudden cardiac death. Distinguishing fibromas from other (malign) cardiac masses is essential for accurate diagnosis and treatment. While there is some experience in management of cardiac fibromas in children, management of adult patients is unknown. We present three cases of cardiac fibroma in adult patients diagnosed by echocardiography, cardiovascular magnetic resonance (CMR), and computed tomography (CT): (1) A 55-year-old male with a left ventricular fibroma leading to reduced left ventricular ejection fraction and mitral regurgitation. He had family history of sudden cardiac death, showed premature ventricular contractions (PVC) and was treated with a primary preventive subcutaneous implantable cardiac defibrillator (S-ICD). (2) A 39-year-old male with right ventricular fibroma as an incidental finding. He complained of episodes of PVC. Due to a low PVC burden, decision was made against ablation and the patient was planned for follow-up. (3) An 18-year-old female with left ventricular apex fibroma detected by CMR shortly after birth and confirmed by surgical biopsy. Being asymptomatic, conservative management was pursued and follow-up by CMR planned. Cardiac fibromas can show various clinical presentations and hence being detected late in life. Given potential complications of surgical biopsy, diagnosis of cardiac fibromas is primarily based on echocardiography, CT, and CMR. Rhythm-disturbances as premature ventricular contractions are common. Due to association with ventricular arrhythmias and sudden cardiac death, preventive ICD placement might be appropriate on an individual basis.