label: Cardiac Undifferentiated Pleomorphic Sarcoma
label_lc: cardiac undifferentiated pleomorphic sarcoma
description: "An undifferentiated pleomorphic sarcoma usually arising from the left atrium of the heart.  It is characterized by the presence of fibrohistiocytic cells, giant cells, and spindle cells arrranged iin a storiform pattern.  Clinical presentation includes signs and symptoms associated with left atrial hemodynamic changes."