Dr. Mark Souidane (sp?), Cornell-Weil/NY Presbyterian - can't recommend him highly enough - my son's surgeon for an ETV (of which he performs many); during a shunt implant a year later at another hospital when I couldn't get an answer from the neuro. performing the surgery, I called Mark and he called be back (twice) between his own surgeries, with great advice. Doesn't get any better than that.