When diagnosed by accident with a solitary fibrous tumor of the hip muscle, I was shocked and scared to say the least! I went for a previous consultation and was on the fence about having the surgery to remove it. I went for a second opinion with Dr. Derek Hansen and knew right away he was hands down the doctor I wanted to go with. He was gentle, confident, direct and explained everything in detail! Before, during and after surgery his compassion for both myself and my wife has been above and beyond! The surgery and recovery went off without a hitch and 3 months later, as he knew I would, I am living my life with little or no after effect. I would highly recommend Dr. Derek Hansen and the staff at HSS at NYP without any hesitation!