This book is a winner of the British Medical Association award (Dermatology Book Category) and the The Society of Authors & the Royal Society of Medicine 2005 book awards (New Edition of an Edited Book). The most complete, in-depth coverage of the field available today in one source! It focuses particularly on aetiology and pathogenesis, disease mechanisms and includes all of the appropriate recent genetic, molecular and basic science data. More than 5,400 illustrations include depictions of clinical variants to support clinicopathological correlation and differential diagnoses. The 3rd Edition has been completely reorganised and redesigned to better meet the diagnostic challenges faced in everyday practice. Histologic diagnostic pitfalls are highlighted throughout and include detailed cross references for all relevant conditions.