Hi Karen,
My mom also was diagnosed with malignant pleural effusion in July 2002. All her other scans showed nothing. But she was certain she had tumors because she used to have pain around her shoulder area and back. No more. My mom is almost in remission now, but she needs to have a surgery to try and re-expand her trapped lung that formed as a result of the constant fluid buildup. A word about malignant pleural effusions: Whether medically or surgically, please get them taken care of PRONTO.