Anal atresia

Discussion:

Distal large bowel obstruction should trigger a differential diagnoses that includes:

Anal atresia should be obvious clinically and you'd hope that the clinicians tell you on the request card.

One way to assess the level of distal obstruction is to perform a lateral radiograph in the prone position although some centers perform an invertogram. This allows assessment of whether the atresia is high or low depending on whether the most distal portion of the gas-filled bowel is above or below the levator.

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