HOUSTON, July 24 /PRNewswire/ -- US Oncology Holdings, Inc. and its operating subsidiary, US Oncology, Inc., will announce 2006 second quarter financial results on Tuesday, August 8, 2006. A conference call and simultaneous Web cast has been scheduled at 9:00 a.m., CDT, for the company's bondholders following the distribution of the news release. In this call, representatives of US Oncology's management team will discuss the financial results. Further information can be found on the company's Web site, www.usoncology.com , in the "News Center" on the day of the earnings announcement.