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Case Report
Copyright: ©Author(s) 2026.
World J Obstet Gynecol. Sep 8, 2026; 15(2): 118869
Published online Sep 8, 2026. doi: 10.5317/wjog.118869
Table 2 Alver et al[19] classification (1993)
Type
Description
Frequency, %
Type IIleum (active component) wraps around the sigmoid colon (passive component). Type Ia - clockwise direction type Ib - anticlockwise direction55
Type IISigmoid colon (active component) wraps around the ileum (passive component). Type IIa - clockwise direction type IIb - anticlockwise direction25
Type IIIIleocecal segment (active component) wraps around the sigmoid colon (passive component)5
Type IVUndetermined - impossible to determine the revolved segment15


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