See Also: Scanzoni's second os(medicine)
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Scanzoni's second os (medicine)


Scanzoni's second os -->
pathologic retraction ring


A constriction located at the junction of the thinned lower uterine segment with the thick retracted upper uterine segment, resulting from obstructed labour; this is one of the classic signs of threatened rupture of the uterus.

Synonym: Bandl's ring, Baudelocque's uterine circle, Scanzoni's second os.