US Oncology Reports Fourth Quarter and Fiscal Year 20...(es and Risks During the fourth quarte...)

During the fourth quarter of 2005, we received a subpoena from the United States Department of Justice's Civil Litigation Division ("DOJ") requesting a broad range of information about us and our business, generally in relation to our contracts and relationships with pharmaceutical manufacturers. We are cooperating fully with the DOJ in responding to the subpoena. At the present time, the DOJ has not made any allegation of wrongdoing on the part of the Company. We cannot, however, provide assurance that such an allegation or litigation will not result from this investigation.

On April 18, 2006, the Company terminated its net revenue model comprehensive service agreement with a practice in Oklahoma, as a result of alleged breaches of that agreement by the practice. The practice accounted for 4.6 percent and 2.3 percent of the Company's revenue and EBITDA, respectively, for the first quarter of 2006. The Company remains in litigation with this practice regarding termination of its service agreement. As a result of the practice's alleged breaches of that agreement and the litigation, we were unable to collect payments on receivables owned by us and other amounts owed by the practice on a timely basis. At December 31, 2007, the total amount owed to us for those receivables of $22.5 million is reflected on our balance sheet as other assets. We intend to pursue the claims we incurred as a result of terminating this service agreement. We also intend to defend against the practice's allegations that we breached the agreement and that the agreement is unenforceable. As with any complex litigation, the process necessary to resolve this claim may take several years.

During March 2007, the Company became aware that it and one of its affiliated practices are the subject of allegations that the practice may have engaged in activities that violate the Federal False Claims Act. These allegations are contained in a qui tam complaint, commonly referr
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