No. 1.] ORIGIN OF HUMAN MONSTERS. Ly, 
No. 82. 
Solid mole, 75 x 60 x 40 mm. 
Dr. Cassidy, Baltimore. 
“Last period began June 3, 1896, and this tumor was 
passed March 8, 1897, about 40 weeks later.” 
The specimen was brought to the laboratory fresh and was 
hardened in formalin. It is pear-shaped, ulcerated on the 
pointed end and the interior appears to be composed of fresh 
blood clots. 
Fic. 82a.—External surface of the mole, slightly reduced. 
Sections of the large solid mass show that within it there 
is a collapsed ovum with folds of the chorion extending 
throughout the specimen. On one side of the specimen there 
are long slender villi. Most of the layers of the collapsed 
chorion are composed of double walls, usually in apposition 
and occasionally completely blended. There is no amnion 
lining the chorion. Along the main central body of the col- 
lapsed chorion there are large quantities of fresh blood. The 
rest of the tumor is composed of old blood clots and nests of 
leucocytes and of syncytium. The syncytial nests are located 
in great part along the chorion, show active growth when 
