Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Evidence-based medicine is a concept that has come to the fore in the past few years. Clinicians are increasingly encouraged to practise patient management based on available evidence in the scientific literature. For example, new pharmacological therapies are only used when large randomized trials have 'proven' that a particular drug is better than existing ones. This is also the case in surgical specialties, although surgery has traditionally seen a lack of use of this information, with individual surgeon's preferences being most influential in treatment choices. However, more recently, there has been a large expansion of trials and studies aimed at providing surgeons with information to guide their choices using firm evidence. This new edition has been revised and expanded to include new data where relevant, and also features a new chapter on pituitary surgery. Landmark Papers in Neurosurgery, Second Edition, remains a key collection of the most important trials and studies in neurosurgery, allowing the reader to rapidly extract key results, and making it essential reading for all neurosurgeons and trainees in the field.

Biomarkers of Hip Implant Function brings together established and potential new biomarkers, critically evaluating their clinical usefulness based on recent evidence. Researchers will benefit from a comprehensive view of the topic to identify underexplored areas. Orthopedic surgeons and general practitioners will use the book to monitor implant performance and facilitate management of their patients. Additionally, the work will benefit engineers and joint implant manufacturers to guide improvements in design. This book will also be of interest to regulators and policymakers by helping them update their guidelines on follow-ups for hip implant recipients. Nearly all orthopedic surgeons have implanted a cobalt-chromium hip and most general practitioners have at least one patient with cobalt-chromium implant on their books. The recent worldwide controversy surrounding metal-on-metal hips means that advice on how to manage patients with these implants is of great interest to these professionals. Hence, this book is a welcomed addition to the conversation.