*    Department of Obstetric and Gynecology No 1, Rostov Medical University, Rostov on Don, Russia;
**   Department of Pathological anatomy, Rostov Medical University, Rostov on Don, Russia;
*** Pathological Department Municipal hospital No 20, Rostov on Don, Russia.

Case report

Interstitial portion of the fallopian tube is less frequently a site of the extrauterine pregnancy. During the last ten months of the year 2008 we had 45 patients with extrauterine pregnancy. In 43 cases (95.6%) the pregnancy was located in ampullar or isthmic portions of the fallopian tube. Only in two cases (4.4%) the extrauterine pregnancy was located in the interstitial part of the fallopian tube. These two cases are presented here.

Case 1

Images 1, 2: The image 1 shows the sac of the extrauterine pregnancy located within the in the myometrium of the right uterine corner. The endometrium of the uterus was thick (17.7 mm) and hyperechoic. The gestational sac measured 34.5 x 31.8 mm). The image 2 shows the embryo within the gestational sac (CRL 8.2 mm, corresponding to 6 weeks and 4 days of pregnancy).

Image 3: The image shows color Doppler signal of the embryonic heart within the extrauterine pregnancy.

Images 4, 5: Pathological specimens showing the fallopian tube and myometrium of the right uterine corner with the gestational sac within the interstitial part of the fallopian tube.

Case 2

Images 7, 8, 9: The image 7 shows sagittal scan of the uterus with the thick endometrium and collection of fluid between endometrial layers. The image 8 shows the sac of the extrauterine pregnancy located within the  myometrium of the interstitial part of the fallopian tube of the left uterine corner. The image 9 shows rich vasculature around the extrauterine within the interstitial part of the fallopian tube of the left uterine corner.

Images 4, 5: Pathological specimens showing the fallopian tube and myometrium of the left uterine corner with the gestational sac within the interstitial part of the fallopian tube.