Prostate Cyst
A prostate cyst is a fluid-filled sac that forms within or near the prostate gland. These cysts are usually benign and may be discovered incidentally on imaging performed for urinary symptoms or other pelvic concerns. Prostate cysts vary in size and type—some are congenital, while others form due to inflammation, obstruction, or infections. Most cause no symptoms, but larger cysts may lead to urinary issues or pelvic discomfort.
What is it?
Prostate cysts can arise from blocked ducts, congenital remnants, inflammation, or prior infections. Types of cysts include simple prostate cysts, ejaculatory duct cysts, Müllerian duct cysts, and prostatic utricle cysts. While most are benign, their appearance and location help determine whether follow-up or treatment is needed.
Imaging—especially MRI or transrectal ultrasound—can show the size, location, and contents of the cyst. These details help distinguish a simple fluid-filled cyst from more complex lesions or abscesses that may require treatment.
Important to Know
Most prostate cysts do not require intervention unless they cause symptoms or appear suspicious on imaging. Infection or inflammation may require antibiotics, while large cysts causing urinary obstruction may need drainage or surgical management. Cysts are typically stable over time but may be monitored if they are large or atypical.
Red flag symptoms include fever, severe pelvic pain, difficulty urinating, or blood in the urine or semen. These could indicate infection, obstruction, or another underlying condition needing prompt evaluation. Follow-up imaging may be recommended to document changes in size or appearance.