SMALL CELL CARCINOMA PRESENTING AS A MASSIVE BIATRIAL MASS WITH OBSTRUCTIVE PHYSIOLOGY DIAGNOSED BY UPPER ENDOSCOPIC ULTRASOUND GUIDED FINE NEEDLE ASPIRATION

We present a rare case of small cell carcinoma presenting as a massive biatrial mass with obstructive physiology at a high risk of hemodynamic collapse. A 31 year-old male presented with 6 weeks of shortness of breath. He was found to have a 15 centimeter neoplasm occupying both atria, obliterating