NEW YORK--(BUSINESS WIRE)-- ImClone Systems Incorporated (NASDAQ: IMCL) announced today its financial results for the quarter ended March 31, 2007. Global net sales of ERBITUX in the first quarter of 2007 were $306.1 million compared to $227.9 million in the first quarter of 2006, an increase of $78.2 million or 34%. U.S. in-market net sales of ERBITUX were $160.1 million compared with $138 million in the first quarter of 2006, an increase of 16%. International net sales of ERBITUX amounted to $146 million compared with $90 million in the first quarter of 2006, or an increase of 62%.