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(PD; Chronic Inflammation of the Tunica Albuginea; Penile Curvature)


An epididymal cyst is a fluid-filled sac in a long tube near the testicle. It is not a type of cancer.


The exact cause is not known. It may happen when the tube is blocked.

Risk Factors

Epididymal cyst is more common in men over 40 years of age. Men whose mothers were given diethylstilbestrol (DES) during pregnancy may be at higher risk. This drug has not been used since 1971.


Most men do not have symptoms. They may notice a lump or mass in the testicle or on the side of the scrotum. Some men may have pain.


You will be asked about your symptoms and health history. A physical exam will be done. An image may be taken to confirm the diagnosis. This can be done with an ultrasound.


The cyst may go away in time. Men with a large, painful cyst may need surgery to remove it. A small incision will be made in the scrotum. The cyst will be taken out. Stitches will be used to close the incision.


The cyst cannot be prevented. The cause is not known.


Family Doctor—American Academy of Family Physicians  

Urology Care Foundation 


Canadian Urological Association 

Health Canada 


Alvarez DM, Bhatt S, et al. Sonographic spectrum of tunica albuginea cyst. J Clin Imaging Sci. 2011;1:5.

Common benign urological conditions in men. EBSCO DynaMed website. Available at: Updated October 2, 2017. Accessed November 5, 2019.

DES sons. DES Action website. Available at: Accessed November 5, 2019.

Epididymal cyst. Patient UK website. Available at: Updated November 23, 2017. Accessed November 5, 2019.

Epididymal cyst and spermatocele. Children’s Hospital of Philadelphia website. Available at: Updated August 2011. Accessed November 5, 2019.

What are spermatoceles? Urology Care Foundation website. Available at: Accessed November 5, 2019.

Revision Information

  • Reviewer: EBSCO Medical Review Board
  • Review Date: 12/2019
  • Update Date: 12/20/2019