- Anorectal malformations can contribute to constipation.
- The anal position index (API) can be used to determine whether the anus is “ectopic”
- Davari, H. A., & Nazem, M. (2004). The anal position index: a simple method to define the normal position of the anus in neonate.
- Girls API is measured by – Anus-fourchette/coccyx-fourchette
- The anus is in an abnormal position if the API is <0.29.
- Boys API is measured by – Anus-scrotum/coccyx-scrotum
- The anus is in an abnormal position if the API is <0.4.
- Girls API is measured by – Anus-fourchette/coccyx-fourchette
- The most commonly cited classification system for anorectal malformations is the “Krickenbeck” classification system – but there is an interesting history of various classification systems and a whole bunch of pictorial classification diagrams on the internet
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