The balance between Th17 cells and regulatory T cells (Tregs) has emerged as a prominent
factor in regulating autoimmunity and cancer. Th17 cells are vital for host defense against …

The 3 major lice that infest humans are Pediculus humanus capitis (head louse), Pthirus
pubis (crab louse), and Pediculus humanus humanus (body louse). Patients with louse …

Dirk M. Elston, MD Charleston, South Carolina In this issue of the JAAD, Lan et al 1 report a
high incidence of cutaneous complications related to prevention measures among health …

Scabies is an ectoparasite caused by the mite Sarcoptes scabiei var hominis, an obligate
human parasite. There are about 300 million cases of scabies in the world each year. Common …

Background Nevus sebaceus is commonly associated with the development of secondary
neoplasms. Data on the frequency of malignant tumors vary considerably in published reports. …

BACKGROUND: The condition that came to be known as nephrogenic systemic fibrosis (NSF)
was first reported in 2000 and, in 2001, was termed “nephrogenic fibrosing dermopathy.” …

Misdiagnosis may result from biopsy site selection, technique, or choice of transport media.
Important potential sources of error include false-negative direct immunofluorescence results …

Published data confirm that community-acquired methicillin-resistant Staphylococcus
aureus (MRSA) infections are increasing in incidence in both urban and rural settings. The …

Demodex mites are normal inhabitants of human hair follicles. D folliculorum is found
predominantly in the follicular infundibulum of facial skin and is typically present in small groups. D …

BACKGROUND Mohs micrographic surgery (MMS) has been established as an alternative
to standard surgical excision for local cutaneous malignant melanoma (MM) and melanoma …