06-02-2011, 07:52 PM
A 50-year-old woman comes to the physician because of a fever, cachexia, and malaise for the past 6 months. Auscultation discloses a low-pitched, early to mid-diastolic murmur. Echocardiography shows a left atrial mass that prolapses into the mitral valve orifice during diastole. Which of the following findings is most likely on microscopic examination of this mass?
A) Amorphous extracellular matrix
B) Glycogen-containing polygonal cells
C) Malignant lymphoid cells
D) Malignant spindle cells
E) Mature adipose cells