Fig. 1

A: Coronal T2 MRI: The left kidney and left ureter were absent (red arrow); B: sagittal view T2 MRI: the round cystic lesion (red arrow); the bladder (yellow arrow); C: axial T2 MRI: the round cystic lesion (red arrow); the bladder (yellow arrow); the left seminal vesicle can only be seen at this level and it had diminished in size (blue arrow); D: The melanin deposits on both sides of the verumonis (red arrow); E: The left ureteral orifice could not be explored (blue arrow); F-H: ①The bladder, ②cyst, ③the right vas deferens,④ the left vas deferens, ⑤the left shrunken seminal vesicle, ⑥which was similar to the seminal vesicle structure on the right side wall of the cyst; I-J: ①The bladder, ②the cyst was empty,③ the left vas deferens, ④the right vas deferens, ⑤the cyst was opened with no visible exit; K-L: Methylene blue was injected into both sides of the proximal vas deferens and methylene blue was seen draining from the inner surface of the cyst (yellow circle); M-N: Postoperative pathology. A: Gross specimen; B: cyst wall (black arrow). A small amount of atrophied seminal vesicle tissue was observed in the focal area around the cyst wall (red circle)