Sigmoid volvulus, Organo-axial volvulus, Split-wall sign 1.Reformatted CT image in axial oblique plane depicting the split-wall sign in a sigmoid volvulus as a band of mesenteric fat in between the twisted intestinal walls (arrows). Keywords: Sigmoid volvulus; Split-wall sign; Organo-axial volvulus EN Sigmoid volvulus Split-wall sign Organo-axial volvulus 3280 3281 2 09/07/23 20231001 NES 231001 A comment to this article is available online at https://doi.org/10.1007/s00261-023-04023-8.