PURPOSE: To determine the radiologic features of primary malignant tumors of the fallopian tube. MATERIALS AND METHODS: By observing six computed tomograms and one MR image, we determined the radiologic features of seven pathologically proven primary malignant tumors of the fallopian tube. The location, size, internal appearances (cystic/mixed/solid) of the tumor were analysed, and the presence or absence of ipsilateral ovary, hydrosalpinx, intrauterine fluid collection, pelvic ascites and lymphadenopathy were determined. RESULTS: All seven tumors were located in unilateral adnexa. Their mean diameter was 3.5 (range, 1.5-6) cm, and their morphological appearance was solid in five cases and mixed in two. In no case were ipsilateral ovaries identified. Hydrosalpinx was noted in four cases (57%) and intrauterine fluid collection in five (71%). Pelvic ascites and lymphadenopathy were each observed in one case (14%). CONCLUSION: Although it is difficult to differentiate between primary malignent tumors of the fallopian tube and other adnexal tumors, a pelvic mass with hydrosalpinx and intrauterine fluid collection suggests a primary malignant tumor of the fallopian tube.