Anorectal anomaly associated with caudal regression: late evaluation after posterior sagittal anorectoplasty

The authors present a case of an anorectal anomaly associated with caudal regression syndrome, sirenomelia (mermaid syndrome), and a spectrum of mesodermal axial dysplasia. It was treated with a colostomy, posterior sagittal anorectoplasty, and closure of the colostomy. The patient is now 7-years-old, with fecal and urinary continence. Comments are made regarding the clinical and surgical findings, the follow-up evaluation, and anorectal manometry in this rare case.