TY - CHAP M1 - Book, Section TI - Auricular Perichondritis A1 - Jauch, Edward C. A1 - Hall, Gregory A1 - Knoop, Kevin J. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Auricular perichondritis is a bacterial infection of the overlying skin and perichondrium of the ear, by definition sparing the auricular cartilage. It may be an extension of OE. Causative organisms include P aeruginosa, S aureus, and S pyogenes. Predisposing factors include surgery, ear piercing, burns, frostbite, insect bites, and contact sports. Clinical findings include a swollen, tender, erythematous, and warm auricle, which may involve the ear lobule, and often a fever; the TM is unaffected. Infectious perichondritis may be confused with relapsing polychondritis, an autoimmune condition involving the cartilage of the ears, nose, and trachea. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/29 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181040066 ER -