The purpose of this exhibit is:
1.To review imaging of ectopic pregnancy with surgical specimen.
2.To show the pathologic findings corresponding to the imaging findings we interpret as ectopic pregnancy,
emphasizing the pathology of the gestational sac(GS)-like structure and differences between the corpus luteum cyst and the GS-like structure.
3.To show rare types of ectopic pregnancy; cervical pregnancy,
cesarean scar pregnancy,
Ectopic pregnancy is one in which the fertilized ovum implants in a site other than the endometrial lining of the uterus,
and it is the leading cause of pregnancy-related death in the first trimester even today.
The incidence of ectopic pregnancy is 1.5-2% of all pregnancies and has increased in the last few decades  probably due to increasing number of sexually transmitted disease and employment of assisted reproductive technology .
MRI is performed when transvaginal ultrasonography (TVUS) is inconclusive or more detailed information of...
Findings and procedure details
MRI appearance of normal pregnancy at 5 weeks’ gestation is shown in figure 1,
and the corresponding TVUS image and anatomic scheme are presented in figure 2.
Tubal pregnancy is a pregnancy that occurs within the fallopian tube,
and it is the most common form of ectopic pregnancy,
accounting about 98% of all ectopic pregnancies.
The most common implantation site is the ampulla (75-80%),
followed by the isthmus (10-15%) and the fimbria (5%),
the interstitial (2-4%) (figure 3) [4,6].
The major teaching points of this exhibit are:
1: To get familiar with imaging findings of ectopic pregnancy including rare types of ectopic pregnancy.
2: To understand the pathological features of ectopic pregnancy.
3: To get to be able to diagnose cases of ectopic pregnancy confidently,
based on the understanding of the anatomy and pathology of ectopic pregnancy.
Barnhart KT (2009) Clinical practice.
N Eng J Med 361:379-87
Kitagaki H (2006) Diagnosis of ectopic pregnancy with MRI: efficacy of T2*-weighted imaging.
Magn Reson Med Sci 5(1):25–32
Parker RA 3rd,
Menias CO (2012) MR imaging findings of ectopic pregnancy: a pictorial review.
Togashi K (2007) MR features of ectopic pregnancy.
Eur Radiol 17: 3236-46