Basic Definitions and Differential Diagnosis Shraddha Desai Jeffrey T.S. Hsu Introduction Primary care providers (PCPs) must understand multiple aspects of medicine. From headaches to foot pain, the physician must be…

Common Disorders of the Nail Apparatus Chao Li Human nails are both aesthetic and functional. Not only do they complete the healthy appearance of hands and feet, they also protect…

Other Dermatologic Conditions Jennifer L. Greenman This chapter will review six common dermatologic conditions that do not neatly fit into the previous chapters. All of the conditions discussed are benign,…

Connective Tissue Disease and Vasculitis-Related Dermatoses Stephanie Hu Peter C. Schalock Autoimmunity is the state of the immune system erroneously attacking self—antigens such as cellular DNA or dermal collagen. The…

Bullous Diseases Ilka A. Netravali James Y.T. Wang The skin has adhesion molecules that anchor keratinocytes to one another and to the underlying basement membrane, partly to resist mechanical trauma….

Leg Ulcers and Decubitus Ulcers Gregory L. Wells Jane Barry An ulcer is defined as a wound with full epidermal involvement and some level of dermal loss. Partial-thickness wounds involve…

Hair Loss Lilla Landeck Nina Otberg Overview of Hair Physiology and Anatomy Hair Types The human body exhibits three different types of hair: terminal, vellus, and lanugo hair. Fine hair…