Uterine torsion with maternal death: our experience and literature review.

Torsion of the gravid uterus around its cervical junction is a rare event especially in humans. In 1992, a literature review by Jensen, mentioned by Carbonne, showed 212 cases with different etiologies. Uterine torsion is more frequently dextrorotatory (2/3 of cases). The diagnosis is difficult and generally done during cesarean section because it is frequently not symptomatic. Uterine torsion signs, when present, are not specifics. Pain, nausea and vomiting may present without any sign of shock, as in our patient. Sometimes ultrasonography can lead to a correct diagnosis, showing a modification of the placenta site during pregnancy, or an abnormal positioning of the ovarian vessels which pass in front of the lower uterine segment. Some authors report cardiotocographic abnormalities probably due to the reduction of blood flow caused by the torsion. Quickness of surgical treatment is fundamental for the reduction of fetal mortality which is very frequent in a large number of cases, while maternal mortality is not so frequent but possible. A diligent anamnesis and ultrasonographic examination are surely useful to single out the rare cases of uterine torsion in pregnancy.