Pak J Med Sci
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Sigmoid volvulus (SV), the wrapping of the sigmoid colon around itself, is a rare colonic obstruction form. SV requires emergency endoscopic or surgical treatment following an urgent resuscitation and the prognosis is relatively poor. ⋯ Thereafter, a great number of relevant subjects were discussed in the literature. The aim of this study is to update the present classification system in light of above-mentioned discussions and our experience with 1,028 SV patients, which is the largest single-centre SV series over the world.