Which of the following does NOT occur with an imperforate anus?

An imperforate anus is a congenital defect where the anal opening is absent or blocked, leading to a range of intestinal and urinary complications. In this condition, the normal passage for stool is obstructed, meaning that liquid stool secretion does not occur because the stool cannot exit the body.

The rectum typically ends in a pouch formation because of the obstructed pathway, which is characteristic of the defect. Urine passing through the anus is also an abnormal occurrence associated with certain types of anomalies, as the urinary tract may be affected. Narrowing of the anus can occur in some cases, but it is not a defining characteristic of an imperforate anus.

Thus, the absence of normal liquid stool secretion is a key feature distinguishing this condition, making it the correct answer in this context.