Background: Isolated fallopian tube torsion is very rare during pregnancy .The reporter's show that the right fallopian tube torsion is most common. Most of the cases have presented in the third trimester. The diagnosis of this torsion is very difficult. There are not pathognomonic symptoms; clinical, imaging, or laboratory findings. The diagnosis is proved during the operation.Case presentation: A 29 years old G4P3L2D1RIII, 33weeks pregnant woman presented with acute colicky abdominal pain with 4 episodes of vomiting &nausea. The sonogram revealed a 2 cm exophytic mass of left ovary probably is haemorrhagic cyst.A laparotomy was performed. The ovaries were normal and there was the isolated torsion in left tube with congestion and necrose. Cesarean section and salpingectomy was performed.
Conclusion:Although isolated twisted fallopian tube during pregnancy is very rare, we should Pay attention in the differential diagnosis of acute abdomen in pregnancy for this case. Early surgical intervention will decrease obstetric morbidity and may help us to preserve the fallopian tube. normal right ovary. A 2 cm exophytic mass of left ovary probably haemorrhagic cyst. Obstetric sonography and fetal evaluation were normal. Total lab tests were normal. The report of surgery consult was expectant management. At the first day in the hospital, she was NPO. Second day she was not vomiting. Nausea and abdominal tenderness was much reduced. The patient had appetite and had liquids.The vital signs of patient were normal. With the surgical consultation, the patient was treated for diverticulitis. On the third day of hospitalization, the laparatomy was done in spite of mild contractions. The cesarean was completed. Adnexa on the right was completely normal. Similarly the left ovary was normal. While the left fallopian tube was found at the site of injection Ampula to Fimbriae torsion. According to fourth cesarean of the patient, salpingectomy was performed (Figures 1-4).