The study referenced in this article correlates well with my own clinical experience of managing pain in patients with cancer.

http://www.healthcmi.com/index.php/acupuncturist-news-online/381-acupuncturecancepain

Even when the disease has progressed to stage 4 and no recovery is foreseen, reducing the need for pain medications and keeping the patient comfortable in their final stage of life can be a blessing to the patient and their loved ones…