The 62-year-old man suffers from vestibular schwannoma, also known as acoustic neuroma, which is a type of non-cancerous brain tumor.
Mr Reeves has revealed that his grape-sized tumor is now being monitored for any changes in size, which means he needs regular MRI scans.
He also lost all hearing in one ear, which caused him to throw out all of his favorite LPs.
Speaking on the Adam Buxton podcast, the comedian said, “I have vestibular schwannoma – it’s a tumor in my head.
“I went completely deaf, 100% deaf, in my left ear, and it will never come back. It’s dead – absolutely completely gone.
He went on to explain that luckily the growth was not likely to be fatal and that he was receiving treatment advice.
“It’s benign. They can’t take it off – they can shrink it or they can leave it and keep an eye on it, and that’s what they do, ”he added.
“If a plane is flying over or a car is approaching, I don’t know where it is.
According to the NHS, an acoustic neuroma is a type of benign brain tumor that “usually grows slowly over many years and does not spread to other parts of the body.”
They grow on the nerve that is used for balance and hearing, which can lead to hearing loss and instability.
Acoustic neuromas can become serious if they get bigger, but are mostly discovered and treated before they reach this stage. are picked up and processed before reaching this stage.
Professor Hanemann, who heads the Brain Tumor Research Center at the University of Plymouth, said: “This tumor results from mutations in the NF 2 gene and Vic would be more likely to have this diagnosis at his age than a younger man. .
He added: “It’s not just a male disease with women affected as well. Balance and hearing problems are common symptoms.
Acoustic neuromas can be treated with brain surgery if doctors feel the lump is getting too big. They can also be treated with stereotaxic radiosurgery, which can prevent the growth from getting bigger.