This likely represents a simple prostatic cyst, which can be a Müllerian duct cyst or utricle cyst.

Müllerian duct cysts can arise anywhere along the path of Mullerian duct regression, from scrotum to utricle (c.f. prostatic utricle cysts always arise from the level of the verumontanum and are always in the midline). They do not communicate with the urethra. They typically extend above the prostate gland.

Prostatic utricle cysts are variable in size but are usually smaller than Müllerian duct cysts and usually do not extend above the prostate gland. They are associated with a variety of genitourinary abnormalities, unlike Mullerian duct cysts.