Test your pain management skills with this case.
A 66-year old man with metastatic prostate cancer develops slowly progressive right-sided pelvic pain in the region of known pelvic metastases. He describes dull-aching pain rated at 8/10 in the lateral pelvis and sharp shooting pain that radiates down the left leg. The pain limits mobility and awakens the patient from sleep. He has no focal motor or sensory deficits. An x-ray shows blastic metastases in the lateral pelvis. He is undergoing a course of palliative radiation therapy. Morphine immediate release 30mg ever 4 hours controlled his pain until the past several days. The dose currently decreases his pain from 8/10 to 6/10 for 1-2 hours at best.