Spontaneous Pituitary Adenomas in Squirrel Monkeys (Saimiri sciureus)
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Updated: Jan 3, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
Published on: January 17, 2018
Gregory J Daggett1, Jennifer S Wood2, Sanjeev Gumber3
1Veterinary Services Unit, Wisconsin National Primate Research Center, University of Wisconsin, Madison, Wisconsin.
Abstract:
On postmortem examination, 2 geriatric captive male squirrel monkeys (Saimiri sciureus) were found to have pituitary masses that were unassociated with previous experimental manipulation. Both animals were euthanized due to apparently unrelated clinical reasons. Histopathology and immunohistochemical staining classified these tumors as thyrotrophic and corticotrophic pituitary adenomas. These cases represent the first reports of this tumor type in squirrel monkeys.

