An adrenalectomy — removal of an adrenal gland — costs roughly $4,000 to $9,000 for a dog, including CT staging, surgery, medication and several days of intensive post-operative care.
There is one word on this page worth more than the rest of it, and it is a drug name.
Phenoxybenzamine
If your dog's adrenal mass is a pheochromocytoma, this matters enormously.
A pheochromocytoma is a tumour of the adrenal medulla that produces catecholamines — adrenaline and noradrenaline. Handling the tumour during surgery can release a surge of them, sending blood pressure and heart rate to dangerous levels in the middle of the operation.
Pre-treatment with an alpha-blocker, usually phenoxybenzamine, for one to two weeks before surgery blocks that response and is associated with markedly better survival. It is standard practice at experienced centres and it is occasionally missed elsewhere.
You are entirely within your rights to ask: "Is this a pheochromocytoma, and if so, will my dog be pre-treated with phenoxybenzamine?" An owner who knows to ask that question is materially safer, and no good surgeon will mind being asked it.
Why adrenal surgery is difficult
The adrenal glands sit high in the abdomen, tucked against the caudal vena cava — the largest vein in the body — and beside the kidneys and major vessels.
Roughly a quarter of adrenal tumours invade the vena cava, growing a tumour thrombus up inside it. Removing that turns an abdominal operation into a vascular one, sometimes requiring the vein to be clamped and opened.
This is why a contrast CT before surgery is essential rather than optional. It shows the tumour's size, its relationship to the vessels, whether a thrombus is present and how far it extends, and whether disease has spread. That information determines whether surgery is feasible at all and which centres can offer it.
The two tumour types
Adrenocortical tumours produce cortisol, causing adrenal-dependent Cushing's disease — increased drinking and urinating, a pot-bellied appearance, hair loss, panting, muscle wasting, recurrent infections. Roughly 15–20% of canine Cushing's is adrenal-dependent rather than pituitary in origin.
Pheochromocytomas produce catecholamines, causing episodic signs that come and go — collapse, trembling, panting, apparent panic, a racing heart, high blood pressure. Because the signs are intermittent, these are frequently found incidentally on imaging done for another reason.
Both can be benign or malignant, and that is not reliably known until the histopathology comes back.
The case for surgery in Cushing's
For most dogs with Cushing's, the disease is pituitary in origin and treatment is lifelong medication.
For the adrenal-dependent minority, surgery is potentially curative. That is a genuinely different offer from lifelong management, and it is the reason this operation gets recommended in a dog whose signs might otherwise be controlled with tablets.
Weigh it against a real perioperative risk that is meaningfully higher than for routine abdominal surgery, and against your dog's age and general health.
Choosing where
Surgeon experience and case volume matter more here than almost anywhere in soft-tissue surgery, and it is fair to ask directly how many adrenalectomies the surgeon has performed and whether they have managed vena caval invasion.
Laparoscopic adrenalectomy is an option at some centres for small, non-invasive tumours in stable patients, with a faster recovery. It is not suitable where there is vascular invasion, and conversion to an open approach partway through is a correct decision rather than a complication.
Recovery
The first 48 hours are the demanding part, and this surgery needs a hospital that can provide intensive monitoring.
- Three to five nights in hospital, with blood pressure, electrolytes and glucose monitored closely
- Steroid supplementation after removal of a cortisol-producing tumour, because the remaining gland has been suppressed and needs time to recover. This is tapered over weeks and must not be stopped abruptly.
- Blood pressure management after pheochromocytoma removal, as pressures can swing in both directions
- Two to three weeks of restricted activity at home
- Sutures out at ten to fourteen days
Call immediately for weakness or collapse, vomiting, refusal to eat, pale gums, or a swollen incision.
Outlook
Better than the difficulty of the surgery suggests, provided the patient survives the perioperative period.
Dogs that come through surgery for a benign, completely removed adrenal tumour frequently do very well, with resolution of the clinical signs and years of normal life. Malignant tumours, tumours with extensive vascular invasion, and cases with metastatic disease carry a poorer outlook.
The honest summary: high-risk surgery with a good reward for the right patient at the right centre. The pre-operative CT and the phenoxybenzamine question are the two things most within your control.
Who isn't a candidate
- Other: A tumour thrombus extending far up the vena cava toward or into the heart, which turns this into a vascular operation few centres will attempt.
- Concurrent condition: An unblocked pheochromocytoma — these tumours dump adrenaline, and operating without 1–2 weeks of phenoxybenzamine pre-treatment is associated with markedly higher mortality. This is the single most important preparatory step.
- Other: Widespread metastatic disease from an adrenocortical carcinoma.
- Concurrent condition: Uncontrolled hypertension, severe cardiac arrhythmia, or a patient not yet stabilised on medical management of hyperadrenocorticism.
Common questions
How much does adrenal tumor surgery cost for a dog?
Roughly $4,000 to $9,000 including contrast CT staging, pre-treatment medication, surgery, anaesthesia and three to five nights of intensive post-operative monitoring. Cases with tumour extending into the vena cava cost more, since the operation becomes vascular surgery with a longer stay. Ask for the all-in figure.
What is a pheochromocytoma in dogs?
A tumour of the adrenal medulla that produces catecholamines — adrenaline and noradrenaline — causing episodic collapse, trembling, panting, apparent panic, racing heart rate and high blood pressure. Because signs come and go, many are found incidentally on imaging. Handling the tumour during surgery can release a dangerous surge, which is why alpha-blocker pre-treatment matters.
Can a dog survive adrenal gland removal?
Yes, and dogs that come through the perioperative period often do very well, particularly where a benign tumour has been completely removed. Perioperative mortality is meaningfully higher than for routine abdominal surgery, and surgeon experience, contrast CT staging beforehand and phenoxybenzamine pre-treatment for pheochromocytoma all improve the odds.
Is adrenal tumor surgery worth it for Cushing's disease?
For the roughly 15–20% of canine Cushing's that is adrenal-dependent rather than pituitary, surgery is potentially curative, which is a genuinely different offer from lifelong medication. That has to be weighed against real perioperative risk and your dog's age and general health. Steroid supplementation is needed afterwards and tapered over weeks.
What are the signs of an adrenal tumor in dogs?
Cortisol-producing tumours cause Cushing's signs — increased drinking and urinating, a pot-bellied appearance, hair loss, panting, muscle wasting and recurrent infections. Pheochromocytomas cause episodic signs that come and go: collapse, trembling, panting, apparent panic and a racing heart. Many are found incidentally on imaging done for another reason.
Sources
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