The Differential Diagnosis of Purpura
INTRODUCTION TO CHAPTER Print Section Listen Purpura is extravasation of red blood cells into the skin or mucous membrane. For this reason, purpuric lesions do not blanch on diascopy (pressing…
Nail Disorders
INTRODUCTION TO CHAPTER Print Section Listen Nails have several important functions. The nail plate acts as a protective shield for the fingertips; it assists in grasping and manipulating small objects….
Pigment Disorders
INTRODUCTION TO CHAPTER Print Section Listen Although disorders of pigmentation are not life-threatening, their impact can be profound. Lack of pigment or excessive pigment is quickly noticed by others and…
Nevi and Melanoma
INTRODUCTION TO CHAPTER Print Section Listen Melanocytic nevi (moles) are common benign skin tumors. In most people, these are primarily of cosmetic significance. However, nevi can occasionally become irritated or…
Actinic Keratosis, Basal, and Squamous Cell Carcinoma
INTRODUCTION TO CHAPTER Print Section Listen Actinic keratoses (AKs) are one of the most common skin findings in dermatology. AKs are benign neoplasms of the epidermis and are considered precursor…
Superficial Fungal Infections
INTRODUCTION TO CHAPTER Print Section Listen Most superficial fungal infections of the skin are caused by dermatophytes or yeasts. They rarely cause serious illness, but fungal infections are often recurrent…
Morphology and Terminology of Skin Lesions
INTRODUCTION TO CHAPTER Print Section Listen Identification and classification of a patient’s skin lesions are important steps in the diagnosis of any skin disorder. The numerous descriptive terms used in…
Urticaria and Drug Rashes
INTRODUCTION TO CHAPTER Print Section Listen Urticaria and cutaneous adverse drug reactions are among the most common skin problems seen in the clinic and hospital. They can be associated with…
Acne, Rosacea, and Related Disorders
INTRODUCTION TO CHAPTER Print Section Listen Acne and related pilosebaceous disorders rarely cause serious systemic problems, but they are among the diseases that can cause significant psychosocial distress. Most of…
Infestations and Bites
INTRODUCTION TO CHAPTER Print Section Listen Arthropods have always feasted on humans and humans have tried countless strategies to keep them from doing so. The societal burden of biting and…
