What structure does this cyst appear to arise from?
Urethra (located anterior to the cyst).
What is the likely diagnosis?
Which gender is most frequently affected?
Far more frequent in women (uncommon in men).
Can you think of a few differentials for this appearance?
Vaginal wall cyst; Skene’s gland abscess; ectopic ureterocoele.
MRI of the pelvis demonstrates on the posterior side of the urethra a fluid-filled thin-walled structure. It appears to communicate the lumen of the urethra (best seen on the axial T2 images). The base of the bladder and the adjacent urethra are displaced.