My dog's Cushing's is gone. Can a tumor disappear with medication?

Question

If a dog is diagnosed with Cushing's and it was determined via a sonar gram that there is a tumor on the pituitary gland, can that tumor disappear after years on medicine for the Cushings? My son's dog was diagnosed with Cushing's several years ago. Now his vet has taken him off the Cushing's meds because he said he no longer has Cushings.

Dr. B. DVM, DACVIM (Oncology) · Accepted Answer

Cushing's can be pituitary in origin or adrenal in origin. A sonogram can not be performed on the pituitary as it is in the brain. This would require a CT or MRI. A sonogram can be performed on the adrenal glands but this does not definitely diagnose Cushing's (is just one of the tests to help aide in diagnosis), that would require blood testing. It is not a disease that goes away on its own unless surgery is performed to remove a mass that is oversecreting hormones. It sounds like the diagnosis was never truly confirmed, especially if medications are being stopped. I would recommend getting a little more clarification from your vet as to this. If additional help is needed referral to a veterinary internist would be the next step. I hope this helps and thank you for using Petco Pet Education Center, formerly Petcoach!

My dog's Cushing's is gone. Can a tumor disappear with medication?

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