TY - CHAP M1 - Book, Section TI - Skin Diseases of the Arms A1 - Goldfarb, Noah A1 - Schultz, Brittney A2 - Soutor, Carol A2 - Hordinsky, Maria K. PY - 2022 T2 - Clinical Dermatology: Diagnosis and Management of Common Disorders, 2e AB - Many skin conditions that affect the arms result from their direct exposure to sunlight, contact with 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 phenomenon) in certain diseases such as psoriasis and lichen planus. Some skin diseases have a predilection for specific locations on the arms. While it is unknown why many dermatoses tend 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=1190940280 ER -