A 30-Year-Old Man Is Brought to the Emergency Department Due

question 311

Multiple Choice

A 30-year-old man is brought to the emergency department due to left-sided weakness.  His left arm was sluggish after awakening, and he had difficulty walking to the bathroom.  The patient has no known medical conditions but has a 2-month history of positional dyspnea.  Vital signs are within normal limits.  On examination, strength of the left upper and left lower extremity is reduced, and touch/temperature sensation is similarly diminished.  Cardiovascular examination reveals an intermittent murmur at the apex without carotid bruits.  Echocardiography shows a mobile, 3-cm left atrial mass obstructing the mitral opening during diastole.  Histologic examination of this mass would most likely show which of the following findings?

• A)Amorphous extracellular matrix
• B)Malignant epithelial cells with necrotic debris
• C)Malignant vascular spindle cells
• D)Organized thrombus
• E)Well-organized, mature adipocytes

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