22 MESENTERIC TUMOUR TAKEN FROM A HORSE. 
of the abdominal viscera from the cavity, and found the 
tumour in question, with the pyloric end of the stomach, 
portions of the colon, and small intestines, attached to it by 
an inch or so of mesentery, as you will see. The colon con¬ 
tained a large quantit}" of coagulated blood and hardened 
faeces; the mucous membrane throughout was of a dark- 
slate colour; the small intestines and rectum were empty, 
and slightly injected. All the other viscera were healthy, 
excepting the flabby state they were in. 
Since I sent the tumour it has occurred to me that there 
may be an opening from the tumour into the colon, and if 
my diagnosis of the contents of the tumour be correct, the 
blood escaped by this opening into the colon. 
I remain, dear Sir, 
Yours very truly. 
To Professor Yarnell. 
REMARKS ON THE ABOVE CASE BY PROFESSOR YARNELL. 
Mesenteric tumours, varying in size from a man’s fist 
to that of his head, are by no means uncommon. Nor is 
the tunriour forwarded by Mr. Fletcher remarkable as far as 
size is concerned, but with regard to its character I consider 
it of rare occurrence. In size it measures about fifteen inches 
by ten, and is ovoid in form. From its attachments and 
connections it must have been situated near the root of the 
anterior mesenteric artery; its upper part a little on the right 
side of the posterior aorta, and behind the former vessel. Its 
attachments are described by Mr. Fletcher. That part, how¬ 
ever, which adhered to the large colon deserves especial 
notice, and shall be alluded to presently. 
On examining the tumour more in detail I first dissected 
from its surface those organs and tissues that were attached 
to it. The duodenum and stomach were only loosely con¬ 
nected to the mass, but a part of the colon was very firmly 
adherent to its outer covering; indeed, it seemed to form a 
part of it. Around that part of the tumour which connected 
it to the spine a number of mesenteric glands existed, but 
apparently much atrophied. They were in no way con¬ 
cerned in the formation of the tumour, either primarily or 
secondarily. 
Having thus examined the outer surface of this abnormal 
development, I next made a section through its entire 
centre, "which at once disclosed what Mr. Fletcher suspected 
the interior to contain, viz., a coagulum of blood nearly as 
