Signs of Drug Abuse
Abstract Drug abuse is a global problem and is directly responsible for minor to serious and fatal illnesses and injuries, as well as adverse sociologic consequences. It is estimated that…
Dermatology
Other Viral Diseases
Abstract Viral infections frequently present with cutaneous manifestations, especially in children. Both viral exanthems and enanthems have a broad range of clinical findings, which may be distinctive or nonspecific. This…
Human Herpesviruses
Abstract The human herpesvirus family is composed of eight distinct viruses that cause infections with a wide spectrum of clinical features, including characteristic cutaneous manifestations. The pathogenesis of herpesvirus infections…
Bacterial Diseases
Abstract Bacterial infections commonly affect the skin and account for ~20% of outpatient dermatology visits. Staphylococci and streptococci cause the majority of bacterial skin conditions, which range from common infections…
Fungal Diseases
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…
Human Papillomaviruses
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…
Dermatologic Manifestations in Patients with Systemic Disease
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…
Nail Disorders
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…
Bites and Stings
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…
Mycobacterial Infections
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…
