Most common benign tumor of heart in children
**Core Concept**
Rhabdomyomas are a type of benign tumor that arises from skeletal muscle cells, specifically from the myocardium in the case of cardiac rhabdomyomas. They are known to be associated with tuberous sclerosis complex, a genetic disorder that affects multiple organ systems.
**Why the Correct Answer is Right**
Rhabdomyomas are the most common benign cardiac tumors in children, often presenting as a cardiac mass on imaging studies. They are typically found in the ventricles and can be associated with symptoms such as heart failure or arrhythmias. In many cases, cardiac rhabdomyomas are found incidentally on imaging studies performed for unrelated reasons.
**Why Each Wrong Option is Incorrect**
**Option A:** Myxomas are the most common primary cardiac tumor in adults, not children. They are typically found in the atria and are often associated with symptoms such as obstructive jaundice or hypothyroidism due to tumor production of various peptides.
**Option B:** Fibromas are rare benign cardiac tumors that can occur in children, but they are not as common as rhabdomyomas. They are typically found in the ventricles and can cause symptoms such as heart failure or arrhythmias.
**Option C:** Teratomas are a type of germ cell tumor that can occur in the mediastinum, but they are not typically found in the heart. They are often associated with symptoms such as chest pain or shortness of breath.
**Option D:** Hemangiomas are benign vascular tumors that can occur in the heart, but they are not as common as rhabdomyomas. They are typically found in the atria and can cause symptoms such as heart failure or arrhythmias.
**Clinical Pearl / High-Yield Fact**
Rhabdomyomas are often associated with tuberous sclerosis complex, a genetic disorder that affects multiple organ systems. Patients with tuberous sclerosis complex should be screened for cardiac rhabdomyomas, particularly in the first year of life.
**Correct Answer:** C.