TY - CHAP M1 - Book, Section TI - Orchitis A1 - Moore, Sarah A1 - Pedigo, Ryan 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 - Orchitis has a variable onset and ranges from mildly uncomfortable to severely painful. It is most frequently a complication of epididymitis, but isolated orchitis without epididymitis can be caused by mumps infection and, more rarely, other viruses. Mumps orchitis occurs 4 to 7 days after parotid symptoms with testicular pain and swelling. It is unilateral 70% of the time with a contralateral infection developing later 30% of the time. The testicle is swollen and tender, sparing the epididymis. The overlying scrotal skin can be edematous and erythematous. Constitutional symptoms of malaise, headache, myalgias, and fever are common. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/29 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041185 ER -