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enclosed in the lymphoreticular tissue of the
spleen and seemed to have reached the organ by
extending through the hilus along the splenic
vessels. In two cases, islets and ductular cells,
and in one case islet cells but not acini, appeared
within the accessory spleen (Fig. 31). The intrasplenic
islet was surrounded by a wall of round
cells, possibly as a reflection of immunological
reaction to the foreign tissue. Three of these
hamsters had received carcinogen treatment and
it is not clear whether the carcinogen stimulated
the entrapped embryonic remnant of pancreatic
tissue within the spleen or if the aberrant spleen
was formed around pre existing normal pancreatic
tissue.
4d. Comparative Anatomic-Histological
Pancreatic Data
Generally, the Syrian golden hamster pancreas,
compared to that of man, has the following special
features:
1. A remarkable shape with one head, three
bodies and three tails;
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2. A specific topography of the gastric lobe,
which lies in an ante-peritoneal position;
3. The relationship of the pancreas to the spleen;
unlike in humans, the pancreas tail does not
anchor in the hilus of the spleen;
4. The presence of omental fat connecting the
tail of the gastric and splenic lobes;
5. The anastomosing artery in the omental fat
connecting the left and right gastroepiploic
arteries;
6. The right gastric and the right gastroepiploic
arteries derive from a common artery arising
from the celiac stem;
7. The presence of the common duct formed by
the pancreatic and common bile duct;
8. The absence of a sphincter on the terminal
(duodenal) end of the common duct;
9. The absence of intramural glands around the
pancreatic ducts; and
10. An even distribution of islets throughout the
pancreas.