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.