TY - CHAP M1 - Book, Section TI - Skin Diseases of the Arms A1 - Lin, Steven W. A1 - Goldfarb, Noah A2 - Soutor, Carol A2 - Hordinsky, Maria K. PY - 2017 T2 - Clinical Dermatology AB - Many skin conditions that affect the arms result from exposure to sunlight, contact allergens or irritants, trauma, bug bites, and other environmental insults. The arms are within close reach of the contralateral hand so patients can easily scratch pruritic dermatoses. Scratching or trauma may produce a linear streak of papules (Koebner reaction) in certain diseases such as lichen planus and psoriasis. Some skin diseases have a predilection for specific locations on the arms. While it is unknown why many dermatoses have a tendency to localize to certain anatomical locations, lesion distribution is frequently a very important clue to establish diagnosis. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - dermatology.mhmedical.com/content.aspx?aid=1177006698 ER -