Myxomas

Myxomas are rare, benign tumors that most commonly develop in the heart, particularly in the left atrium. These growths are made up of gelatinous connective tissue and can interfere with normal heart function by blocking blood flow or causing irregular heartbeats. Because they are located in the heart, myxomas primarily affect the cardiovascular system. Symptoms may include shortness of breath, chest pain, or fainting, often related to the tumor obstructing blood flow or causing embolic events. If pieces of the tumor break off, they can travel through the bloodstream and cause blockages in other organs, leading to serious complications. Diagnosis often involves imaging tests to visualize the tumor. Treatment usually requires surgical removal to prevent life-threatening problems.

Myxomas are the most common primary cardiac tumors, characterized by benign neoplastic growths composed of stellate or globular myxoma cells embedded in a myxoid stroma. They typically arise from the endocardium, most frequently in the left atrium near the fossa ovalis. The pathogenesis involves abnormal proliferation of multipotent mesenchymal cells. Clinically, myxomas are significant due to their potential to cause intracardiac obstruction, embolic phenomena, and constitutional symptoms such as fever and weight loss. They may present with signs of mitral valve obstruction, including dyspnea and syncope, or systemic emboli causing stroke or peripheral ischemia. Histologically, they show abundant mucopolysaccharide matrix with scattered cells and may produce interleukin-6, contributing to systemic symptoms. Surgical excision is the definitive treatment to prevent complications.