PMC9674873_01
Axial CT image of the pelvic region shows a pelvic cyst with multiple daughter cysts in the retrovesical space (arrow). The lesion is seen causing mass effect on the posterior wall of the urinary bladder.
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CT scan of the abdomen and pelvis demonstrated a large cystic lesion of approximate size 7.5 x 6.5 x 5.8 cm (Volume ~ 150 ml) in the retrovesical space with compression on the posterior wall of the urinary bladder (Fig. 1).
Ultrasound of the lesion at follow-up, 2 weeks after PAIR shows a pseudomass in the retrovesical region. The membranes within the cyst appear clumped within the center of the lesion (arrow).
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On follow-up after 2 weeks, there was further solidification of the cyst components with no significant fluid component seen on USG (Fig. 2).
Axial CT image of the pelvis at the same level as Fig. 1, 8 weeks after PAIR procedure shows a retrovesical pseudomass (arrow). The mass effect on urinary bladder has reduced as compared to pre-procedure scan.
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Follow-up CT after 8 weeks showed a small pseudomass of size approximately 2.5 x 2.1 x 1.8 cm in the retrovesical space with few foci of calcifications (Fig. 3).