RCIS Practice Test 2026 – All-in-One Exam Prep

The myxoma is a type of primary cardiac tumor that is most commonly found in the left atrium of the heart. This benign tumor generally arises from the endocardium (the inner lining) and is often noted for its gelatinous appearance.

The left atrium is particularly susceptible to the formation of myxomas due to its anatomical characteristics and the presence of factors that can promote tumor growth. They can obstruct blood flow or lead to embolic phenomena due to pieces of the tumor breaking off and entering the systemic circulation.

In contrast, while cardiac tumors can theoretically occur in other chambers, the prevalence of myxomas occurs primarily in the left atrium, which is why this option is the best choice. The other locations listed, such as the right atrium, aortic valve, and left ventricle, do not typically host myxomas with the same frequency or are associated with different types of tumors. Understanding this specific location helps in diagnosing and managing the condition effectively.