Adnexal and ovarian torsion cause acute or chronic abdominal pain, and on ultrasonography, CT and MRI, the radiologic findings of twisted pedicle are clearly demonstrated. Due not only to the rarity of the disease but also because the symptoms and signs are similar to those seen in cases of adnexal torsion, isolated torsion of the fallopian tubes is not easily diagnosed. The author describes two cases of this condition which on CT and ultrasonography showed the "whirling" pattern of twisted pedicle located at the tubal end ; this pattern is associated with tubal pregnancy or hydrosalpinx. The distal location of twisted pedicle at the fallopian tube, ipsilateral tubal dilatation and ipsilateral normal ovary suggests isolated torsion of the fallopian tubes.ian tubes.