M line imperforate anus
Anal atresia, or imperforate anus, refers to a spectrum of anorectal (below the levator ani plane) if it is below the pubococcygeal line (PCL) and high if above it.
Anorectal malformations
M-line of Cremin is an imaginary line that can be used to determine the level at which the blind pouch ends in anal atresia, determining whether the anal atresia .
Anal atresia | Radiology Reference Article | www.nolixxxpic.com
Description:Hence, the anomalies are most frequently associated with rectovesical fistula, but the major spinal anomalies are seen in all groups including those with perineal fistula. The absence or abnormal location of the anus is generally apparent. In the male, besides the absent anus, a note must be made of the anal pit. The fistula may be of small caliber; hence, it may take up to 24 h for it to be apparent. The reason for this is that it takes this long for ingested gas to travel down the gut to the blind rectum.
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