Abstract
A pancreatic islet cell adenoma was suspected in a 2.5-year-old pet rat that was presented for lethargy and progressive paraparesis. Hypoglycemia was confirmed using a handheld glucometer. Mild improvement was noted after initial corticosteroid treatment. No evidence of a pituitary mass was identified on magnetic resonance imaging. Although a slight treatment response was observed following drug administration the patient's clinical condition deteriorated to the point that the owners elected to have the rat euthanized. Histopathologically, an islet cell adenoma was identified within the pancreas, along with peripheral neuropathy and muscle atrophy, which were consistent with clinical findings. Immunohistochemical staining of neoplastic cells was positive for insulin. Pancreatic islet cell adenomas are not commonly reported, and their clinical prevalence in pet rats is undetermined. The current report describes a case of pancreatic islet cell adenoma in a rat with concurrent peripheral neuropathy secondary to hypoglycemia.
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