Netter's Surgical Anatomy Review P.R.N., by Robert B. Trelease, makes it easy to visualize the anatomy that underlies the procedures and clinical conditions you see during a surgical residency or clerkship. Vibrant, detailed artwork by preeminent medical illustrator Frank H. Netter, MD illuminates each structure and its clinical relevance. A compact, portable format enables you to carry and consult the content anywhere "as needed." Netter. Customers have been asking for a "baby Netter" or "little Netter".and here it is! It's how you know.