A Twin Cities nurse charged with stealing pain medication from a patient who then endured significant pain during a medical procedure missed a court appearance Tuesday because she is in treatment for drug addiction, a court official said. Sarah M. Casareto, 33, of Forest Lake, is accused of taking some of the powerfully addictive fentanyl that she checked out for patient Larry V. King, 56, of Bloomington, before a routine procedure for kidney stones on Nov. 8 at Abbott Northwestern Hospital in Minneapolis.