314 MALL. [Vor. AIX. 
No. 323. 
Pear-shaped hydatidiform mole, 120 x 90 x 65 mm. 
Dr. Van Williams, Baltimore. 
The fresh specimen was brought to the laboratory and was 
found to be composed of enlarged villi, most of which meas- 
ure about 5 mm. and a few fully 20 mm. in diameter. On 
one end the specimen is fibrous, from which the villi extended 
into a bloody mass. 
Fic. 323—Photograph of the mole. Natural size. 
The villi are very irregular in form, the mesoderm being 
hyaline, in which there are numerous spindle-shaped nuclei. 
Some of the “large villi” have in them a lumen which has 
all of the characteristics of the ccelom; in fact, it appears as 
if the main wall of the chorion ramified in all directions with 
the growth of the villi. One of these openings is 15 x 10 mm. 
and another just beside it is 7 x 2 mm. in diameter. 
