Veterinary Surgeons Remove Pituitary Tumor from Cat
A domestic cat in Bend underwent a successful procedure to treat a rare, insulin-resistant brain tumor in May 2026.
Updated on Oct. 21, 2026 in Pet Health
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In May 2026, a 10-year-old cat named Mars traveled to the Veterinary Referral Center of Central Oregon in Bend for a complex pituitary tumor removal. The procedure successfully addressed the condition that had caused severe insulin resistance.
Why it matters
The tumor caused the cat's pituitary gland to produce excess growth hormone, making previous medical and radiation treatments ineffective. Following the surgery, the cat saw its insulin requirements return to normal levels and experienced improved mobility.
The surgical team removed the tumor by drilling a 6-millimeter access hole in the skull and utilizing a 3D camera. The patient, a 10-year-old domestic short-hair, previously required 20 units of insulin daily to manage the growth hormone imbalance.
The players
Dr. Annie Chen-Allen
She is a veterinary surgeon who previously taught at Washington State University for 17 years.
Veterinary Referral Center of Central Oregon
This is the specialized animal hospital in Bend where the surgical team performed the operation.
The details
Surgeons accessed the pituitary gland, which is roughly the size of a green pea, to excise the growth that resisted prior non-invasive therapies. The procedure requires specialized equipment and allows the animal to recover from insulin-dependent symptoms that had previously hindered its quality of life.
Timeline
May 2026: Mars traveled to Bend for the surgical procedure.
Culture Shift
The success of this complex neurosurgical procedure highlights a move toward advanced veterinary specialized care that mirrors human medical standards. These surgical interventions represent a departure from legacy palliative care for animals suffering from previously untreatable glandular tumors.
Pet owners facing complex medical diagnoses can see that specialized neurosurgical options are available for cats with persistent health conditions. Owners of similar patients should be aware that such procedures often necessitate long-term commitments to steroid and thyroid management.
The takeaway
This case demonstrates that advanced surgical intervention can resolve severe insulin resistance when traditional medication and radiation fail. Pet owners should consult with specialized centers to explore all surgical options for chronic endocrine tumors.
Further reading
For more information on specialized animal medical procedures, see the Pet Health section.
Source note: This article includes information reported by The Source - Bend, Oregon.
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