Abstract Cutaneous fungal infections are classified by the depth and extent of involvement: superficial, subcutaneous, and systemic. Dermatophytoses, tinea versicolor, and cutaneous candidiasis are common superficial mycoses, which are characterized…
Abstract Human papillomavirus (HPV) infections of skin and mucosa are very common and in general cause benign papillomas or warts. More than 150 HPV types have been completely sequenced, and…
Abstract Because of the frequency of skin involvement in systemic diseases, cutaneous manifestations often prove very helpful in establishing the correct diagnosis. The skin signs of systemic disease can be…
Abstract The nails have several important functions, which become readily apparent when the nails are absent or lose their function. The most evident use of fingernails is adornment of the…
Abstract Bites and stings are common and cause human disease through direct toxic effects of the venom, immune responses, and vector-borne infections. The chapter discusses the evaluation and treatment of…
Abstract This chapter discusses leprosy, tuberculosis, and non-tuberculous mycobacterioses that can present with cutaneous lesions. Leprosy, a chronic infection with Mycobacterium leprae , is a slowly progressive disease with a…
Abstract Exposure of the skin to UV light leads to both acute, short-term effects (sunburn and tanning) and chronic, long-term effects (photocarcinogenesis and photoaging), all of which are wavelength-dependent. All…
Abstract This chapter reviews the human immunodeficiency virus (HIV) pandemic and the broad spectrum of infectious, inflammatory, and neoplastic skin conditions that may occur in the setting of HIV-induced immune…
Abstract Cutaneous lesions may develop as a result of a variety of environmental insults from heat or cold exposure to water immersion and electricity. Injuries to the skin can also…
Abstract Members of the order Rickettsiales are small, obligately intracellular, Gram-negative bacteria that reside within an arthropod host (tick, flea, louse, or mite) during part of their life cycle. At…
