苗勒氏管畸形的影学诊断 北京协和医院.ppt

。 * The various Mullerian duct anomalies can be categorized broadly as follows: Class 1: Segmental agenesis and variable degrees of uterovaginal hypoplasia Class 2: Unicornuate uteri that represent partial or complete unilateral hypoplasia Class 3: Uterus didelphys, in which duplication of the uterus results from complete non-fusion of the mullerian ducts Class 4: Bicornuate uteri that demonstrate incomplete fusion of the superior segments of the uterovaginal canal Class 5: Septate uteri that represent partial or complete non-resorption of the uterovaginal septum Class 6: Arcuate uteri that result from near complete resorption of the septum Class 7: Comprise sequel of diethylstilbestrol exposure?in utero Mayer-Rokitansky-Küster-Hauser syndrome. (a) Sagittal T2-weighted MR image shows complete absence of the cervix and uterus with an abnormally truncated vagina ending in a blind pouch (arrowhead) between the rectum (r) and urinary bladder (b). (b) Axial T2-weighted image shows the presence of normal ovaries (*). Unicornuate uterus with no rudimentary horn. (a) Illustration shows a right unicornuate uterus with no rudimentary horn. (b) HSG image shows a small, oblong uterine cavity (*) deviated to the right of midline with a single fallopian tube (arrowhead). (c) Axial T2-weighted MR image shows a single uterine horn (*) and cervix (arrowhead). (d) Coronal T2-weighted MR image shows absence of soft tissue adjacent to the right unicornuate cervix (arrowhead), a finding indicating absence of a rudimentary horn. (Fig 7a courtesy of Joanna Culley, BA.) Unicornuate uterus with an obstructed noncommunicating rudimentary horn. Axial T2- weighted MR images show a normal-appearing left unicornuate uterus (arrow in a) and an obstructed noncommunicating right rudimentary horn with layering debris (* in b). * MR imaging demonstrates two separate uteri with widely divergent apices, two separate cervices, and usually an upper vaginal longitudinal septum. In each uterus, the endomet