Fig. 1From: What is hiding in the hindgut sac? Looking beyond rectal carcinomaRetrorectal or tailgut cyst in a 42-year-old woman. a Sagittal T2-weighted MRI reveals unilocular cystic lesion (arrow) in the retrorectal location. b Sagittal T1-weighted MRI image reveals the lesion (arrow) to be hypointense. c Axial T2-weighted MRI again demonstrates the cystic lesion (arrow)Back to article page