Pityriasis rosea presents with erythematous macules that develop a delicate central silver scale. As the lesions evolve, they assume an oval configuration often best observed on the back and flanks….
Tuberculosis and atypical mycobacterial infections can be difficult to diagnose clinically and require a high index of suspicion and familiarity with their manifestations in the skin. Tuberculosis (TB) is more…
Dermatitis can present with a variety of physical examination findings ranging from exuberant oozing to dry scale. These findings represent the acute and chronic inflammation that defines a variety of…
This chapter catalogues many examples of how the skin reacts to the external environment from which it protects the body. Exposure to physical factors such as heat, cold, moisture, ultraviolet…
Pruritus often produces distinctive skin lesions, characterized by angulated borders. Endogenous diseases (in common parlance, an “inside job”) tend to produce lesions that are rounded in character, whereas exogenous caustic…
The astute clinician uses the appearance of the eruption and its accompanying symptoms to arrive at an accurate diagnosis. A symptom, such as itch or pain, is something that the…
The diagnosis of skin disease is based on color, morphology, and distribution of cutaneous lesions. The structure of the skin and associated appendages relates directly to these characteristics. Folliculitis presents…
In this chapter proliferations derived from vascular endothelial cells, fibroblasts, myofibroblasts, smooth muscle cells, Schwann cells, and lipocytes are reviewed. Also discussed are several neoplasms of cells invading or aberrantly…
Epidermal Nevi Epidermal nevi are hamartomatous growths of the epidermis that are present at birth in about half of patients or develop early in childhood. The term epidermal nevus includes…
