This video demonstrates a technique to expose the sympathetic and parasympathetic nerves of the pelvis to preserve them in radical pelvic surgery, by means of direct visualization, in a similar fashion to the technique used to preserve the ureters. An alternative to this technique is to use landmarks for limiting dissection and avoiding intraoperative nerve injury. Despite being safe and more easily reproducible, this latter technique is associated with a higher rate of symptom persistence.

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The newborn was well and presented no problems in the postnatal period. On the 12 th day of life neonatal ultrasound showed a cyst measuring 8.1 × 7 × 3.6 cm on the right side of the abdomen. At 122 days of life a laparotomy revealed a cyst of 8cm with a broad base attached to the left lobe of the liver. A partial excision with marsupilization of the cyst wall was performed. On histological examination, the capsule of the cyst was found to consist of fibrous tissue with no specific epithelium lining the cyst wall. Based on this case, we suggest that congenital cyst of the liver be considered in the differential diagnosis of large cystic masses in fetuses.

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