16-slices helical CT features of torsion of ovarian tumor

Objective: To analyze the CT 16-slices helical features of torsion of ovarian tumor. Methods: CT manifestations of torsion of ovarian tumor in 12 cases proven by surgery and pathology were analyzed retrospectively. Results: Of 12 cases, the tube thickening was found on the twisted side in 9. Ten of the ovarian tumors were cystic or cystic-solid, which proved eccentric wall thickening in 7 cases. Five cystic or cystic-solid tumors were lack of enhancement after contrast administration. No enhancement was seen after injecting contrast agent in 2 solid masses. Ascites was present in 5 patients. Deviation of uterus to the side of the twisted ovarian was noted in 7 patients. Conclusion: Three findings (tube thickening, smooth wall thickening and lack of contrast enhancement of the internal solid component or the thickened wall) seem to be diagnostic for the twisted ovarian tumor. 16-slices helical CT imaging may be more helpful in detecting a thickened tube. (authors)