 Patients will be monitored closely, because all drugs have side effects. Ketorolac is a nonsteroidal anti-inflammatory drug, one that may cause gastrointestinal upset. Fentanyl is a powerful narcotic drug that is safe at the dosage used in this study, but stomach upset, dizziness, and breathing trouble may occur. Also, risks from the biopsy include discomfort from injecting the numbing medicine, infection, and bleeding. There may be discomfort from the sedative injected into the vein, and there may be bruising. 