84 
OVARIAN PREGNANCY 
Douglas. The Fallopian tube was normal from end to end. The 
mass of blood clot was “as large as a fist”; the enlarged-ovary was 
incorporated with ip and formed part of the walls of a sac in which the 
clot lay. Microscopical examination revealed the presence of villi 
scattered through the clot, and also imbedded in the ragged walls of 
the cavity, which was thus proved to be a gestation sac. The walls 
of the sac, where formed by the ovary, consisted of intensely vascular 
ovarian stroma, which was even more reticular than in the remainder 
of the gland, the fibres running parallel to the surface. The vessels 
were greatly enlarged and thin walled, and many of them opened 
directly into the gestation sac. The cavity of the sac was ragged 
and irregular, large areas having the appearance of fibrin with 
villi imbedded in it. At no point did the villi actually penetrate to 
the ovarian stroma. 
The membrane lining the sac presented a striking resemblance 
to the necrotic layer of the decidua of a 3rd or 4th month pregnancy, 
but there was no trace of decidual cells in any part of the wall. 
Bulging into the sac from the lower part of the ovary was a large 
corpus luteum, which was perfectly intact and separated from the 
gestation sac by a thin lamella of loose and very vascular ovarian 
stroma. In the fibrin layer covering this part of the wall of the 
sac the imbedded villi were present in relatively greater number. 
There were no lutein cells visible anywhere except in the intact corpus 
luteum. 
VI.—The Case of Franz. 
In this instance the gestation sac took the form of a fleshy mole 
situated alongside a large corpus luteum, which showed an interval in 
its wall next the chorionic vesicle. There was no lutein tissue round 
the mole, and the general relations were very similar to those in the 
present case, but owing to the size of the chorionic vesicle they are 
less well defined. 
