. Carnegie Institution of Washington publication. ON THE FATE OF THE HUMAN EMBRYO IN TUBAL PREGNANCY. 99 was enlarged and in the left side could he felt a movable mass somewhat larger than the left ovary and separate from it. The right side seemed clear. At the operation, on July 13, the mass in the left side was found to be an extra- uterine pregnancy, about 3 cm. in diameter, in the middle portion of the left tube. The uterine portion of the tube \v:is removed. The right tube and ovary were normal. The specimen consists of the left Fallopian tube, which forms an S-shaped spiral. At the uteri
. Carnegie Institution of Washington publication. ON THE FATE OF THE HUMAN EMBRYO IN TUBAL PREGNANCY. 99 was enlarged and in the left side could he felt a movable mass somewhat larger than the left ovary and separate from it. The right side seemed clear. At the operation, on July 13, the mass in the left side was found to be an extra- uterine pregnancy, about 3 cm. in diameter, in the middle portion of the left tube. The uterine portion of the tube \v:is removed. The right tube and ovary were normal. The specimen consists of the left Fallopian tube, which forms an S-shaped spiral. At the uterine end the specimen undergoes an egg-shaped dilatation, becoming about 20 mm. in diameter. From the segment of the tube next adjoining this, projects a tumor-like swelling, 25X15X 15 mm., over the surface of which chorionic villi may be seen exposed in some places. Sections through the swelling of the uterine end show the tube with its periphery infil- trated with blood. A slit-like chorionic cavity, 6X2 mm. is found near the beginning of the dilatation. Sections were taken through the uterine end of the tube, through the middle of the swelling, and the fimbriated end, which contains a very small opening. The folds in the uterine end of the tube are unusually well pronounced; none of them are adherent. At the fimbriated end the lumen is almost closed and is lined with two concentric layers of mucous membrane with numerous epithelial pockets between them. The condition of the mucous membrane in the uterine and fimbriated ends of the tube appears to be the reverse is usually found in these cases, but careful inspection proves definitely that the two ends were not mixed at the time the sections were taken. Sections through the middle of the tube struck the point of implantation, which seems to encircle the entire wall, and not the faintest trace of the tube lumen can be made out. The blood within the tube lumen is mostly fresh and partly organized; within are seen many vil
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