Adnexal and ovarian torsion cause acute or chronic abdominal pain, and on ultrasonography, CT and MRI, theradiologic findings of twisted pedicle are clearly demonstrated. Due not only to the rarity of the disease butalso because the symptoms and signs are similar to those seen in cases of adnexal torsion, isolated torsion of thefallopian tubes is not easily diagnosed. The author describes two cases of this condition which on CT andultrasonography showed the "whirling" pattern of twisted pedicle located at the tubal end ; this pattern isassociated 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.