Following images and videos show a case of dermal sinus that was initially seen as a cystic appendage protruding out of the lumbosacral region. Later at 19 weeks only a small hyperechoic remnant was present and disappeared at 23 weeks. Postnatally only a small cutaneous lesion was present in the sacral area of the skin.

Images 1, 2, 3, 4: 14 weeks of gestation; cystic appendage protruding out of the lumbosacral region can be seen (arrow).