Atrial myxoma is associated with the following except –
**Core Concept**
Atrial myxomas are the most common type of primary cardiac tumors, arising from the atrial septum. They are often benign and can cause a variety of symptoms due to their location and potential to obstruct blood flow.
**Why the Correct Answer is Right**
Atrial myxomas are associated with a higher incidence of systemic embolism due to their potential to erode into the bloodstream and release embolic material. This is thought to be related to the tumor's production of various growth factors and cytokines, which can promote a pro-thrombotic state. The tumor's location and potential to obstruct blood flow can also lead to symptoms such as dyspnea, palpitations, and fatigue.
**Why Each Wrong Option is Incorrect**
**Option A:** Atrial myxomas are not typically associated with a family history of the condition, making option A incorrect. Atrial myxomas are generally sporadic, although there may be a genetic predisposition in some cases.
**Option B:** Atrial myxomas are indeed associated with a higher incidence of systemic embolism, making option B incorrect. This is a key feature of the condition and can be a major source of morbidity.
**Option C:** Atrial myxomas are often associated with a higher incidence of mitral stenosis, making option C incorrect. The tumor's location and potential to obstruct blood flow can lead to changes in the mitral valve and surrounding structures.
**Clinical Pearl / High-Yield Fact**
Atrial myxomas are often referred to as "cardiac tumors with a mind of their own" due to their unpredictable behavior and potential for sudden embolic events. It's essential for clinicians to be aware of the condition and its potential symptoms, particularly in patients presenting with unexplained systemic embolism or atrial obstruction.
**Correct Answer: A.