Feline acromegaly: which treatment achieves most remissions
11-year-old neutered male domestic shorthair, diabetic for 8 months, poorly controlled despite very high insulin doses. He has gained weight, has a broader head and prognathism. Very high IGF-1 and CT showing a 7 mm pituitary mass.
Which option offers the best chance of controlling the acromegaly and achieving diabetic remission?
chevron_right Show answer and explanation
A. Increasing the insulin until blood glucose normalises, without treating the cause
It may partly improve the signs, but it does not act on the tumour and requires very high doses, with a risk of hypoglycaemia if GH secretion fluctuates. Remission is exceptional with this approach.
B. Transsphenoidal hypophysectomy at an experienced centre
Correct. It removes the source of GH and, in experienced hands, is the option with the highest rate of diabetic remission, often within a few weeks. It requires a specialised team and hormone replacement afterwards.
C. Pituitary radiotherapy
It is a valid alternative that lowers insulin requirements in many cats, but its effect is delayed and unpredictable, and diabetic remission is less frequent than with surgery. It also requires several anaesthetics.
D. A low-carbohydrate diet to achieve remission without other treatment
Diet helps any diabetic cat, but while GH excess persists, insulin resistance remains and remission is very unlikely.
lightbulb Key takeaway
Suspect acromegaly in a diabetic cat needing high insulin doses. Hypophysectomy offers the highest remission rate; radiotherapy and pasireotide are alternatives when surgery is not available. With any treatment, insulin requirements can fall suddenly: monitor blood glucose closely.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.