RT Book, Section 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 SR Print(0) ID 1181040044 T1 Preauricular Sinus Abscess T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessmedicine.mhmedical.com/content.aspx?aid=1181040044 RD 2024/10/10 AB A preauricular sinus is a common congenital malformation of the preauricular soft tissues. It is a sinus located near the front of the ear and is lined with squamous epithelium and thus may produce epithelial-lined subcutaneous cysts, which may become infected, leading to cellulitis or abscess. Patients may have other congenital anomalies such as hearing loss or renal disease. Patients may present with recurrent ear discharge, pain, swelling, redness, itching, headache, and fever. The diagnosis is often overlooked in early stages.