This online textbook from eMedicine (from the Boston Medical Publishing Corp.), provides information on a wide range of dermatology topics with an evidence based focus. Topics include acropustulosis of infancy, blue nevi, cat-scratch disease, molluscum contagiosum, hirsutism and many more.
The chapters (available in full text) provide disease synopses that present images, pathophysiology, clinical and physical findings, symptoms and differential diagnosis. Each chapter is written by a physician, who can update his/her chapter at any time. Each chapter has full author and editor details, with contact e-mail addresses. There is a self test after some of the chapters.