There are many changes in the skin, hair, and nails during and after pregnancy. Patients are certainly aware that those changes are occurring, but few physicians and even fewer patients know how to predict the course of those changes. Pigmentary changes occur, but are they permanent? Can they be prevented or reversed? Hair may become thicker during pregnancy, only to fall out in the postpartum period. When will hair stop falling out? Will it grow back? What hormonal changes are occurring to produce these effects on the skin, hair, and nails? Will those hormonal changes affect other organs? Some cutaneous manifestations of pregnancy are common and recognized by most physicians. Abdominal striae, for example, are easily identified, but physicians have many questions about them. Why do they develop? Can they be prevented or treated? Other cutaneous manifestations of pregnancy are less common and recognized by few. For example, pruritic urticarial papules and plaques of pregnancy is a debilitating condition that is treatable once diagnosed. Even more important than the treatment, the knowledge imparted to a worried mother that her child will be fine and that the condition is se- limited is priceless; but the condition must first be recognized by the patient's physician. All of these questions and conditions are addressed in this extraordinary book. Pigm- tary disorders are addressed in detail in Chap. 2.

It has become increasingly clear that psoriatic disease, both of the skin and joints, can be a significant diagnostic and therapeutic challenge for the physician and a debilitating illness for the patient. Genetic and immunologic advances have increased our understanding of the pathophysiology of psoriasis and psoriatic arthritis and there is a need for practically oriented evidence based references to describe the management options open to clinicians. The speed at which developments are occurring in the field also necessitates a novel approach to keeping up with these changes in practice and the need is for a reference that that be updated regularly as the subject requires. Psoriasis is an incredibly fast-moving discipline within dermatology. Guidelines, treatment options and management all change at incredible speed. There is a requirement to provide a comprehensive reference resource to provide practical, user friendly information for the dermatology profession to aid in the decision-making process. Psoriasis is a graphical subdiscipline of medicine and therefore this will have copious illustrations. As a fast moving discipline the emphasis must be on annual updates to ensure that readers are kept up to date on the important areas of development.

There are many changes in the skin, hair, and nails during and after pregnancy. Patients are certainly aware that those changes are occurring, but few physicians and even fewer patients know how to predict the course of those changes. Pigmentary changes occur, but are they permanent? Can they be prevented or reversed? Hair may become thicker during pregnancy, only to fall out in the postpartum period. When will hair stop falling out? Will it grow back? What hormonal changes are occurring to produce these effects on the skin, hair, and nails? Will those hormonal changes affect other organs? Some cutaneous manifestations of pregnancy are common and recognized by most physicians. Abdominal striae, for example, are easily identified, but physicians have many questions about them. Why do they develop? Can they be prevented or treated? Other cutaneous manifestations of pregnancy are less common and recognized by few. For example, pruritic urticarial papules and plaques of pregnancy is a debilitating condition that is treatable once diagnosed. Even more important than the treatment, the knowledge imparted to a worried mother that her child will be fine and that the condition is se- limited is priceless; but the condition must first be recognized by the patient's physician. All of these questions and conditions are addressed in this extraordinary book. Pigm- tary disorders are addressed in detail in Chap. 2.