TY - CHAP M1 - Book, Section TI - Varicocele A1 - Moore, Sarah A1 - Pedigo, Ryan A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason Y1 - 2021 N1 - T2 - The Atlas of Emergency Medicine, 5e AB - A varicocele forms when the veins along the spermatic cord become engorged due to valve incompetence and is usually asymptomatic. Patients may complain of a dragging sensation or heaviness of the testicle, or notice the painless mass of veins itself (bag of worms). It usually develops slowly by the third decade of life and is on the left side approximately 90% of the time. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/28 UR - accessmedicine.mhmedical.com/content.aspx?aid=1181041319 ER -