He said: "Unfortunately - or perhaps fortunately - medicine doesn’t work that way.
"Some of these abnormalities are quite common, but rarely cause any problems.
"For a link to be made with a scan finding, and for surgery to be proposed, there has to be a plausible mechanism for symptoms to be produced and a reasonable expectation that the symptoms will be resolved by surgery.
"And surgery is, of course, not without risks. For any surgery, the risk of operating has to be less than the risk of not operating."
Pineal cysts symptoms can be caused if the cyst is big enough to obstruct the passage of cerebrospinal fluid - the fluid constantly produced by the brain, which bathes and supports it, he added.
"In this case, pressure inside the head can rise, causing headache and very occasionally more serious problems.
"By and large surgeons will not offer surgery if this is not the case.
"But in the case of cysts of the pineal gland, there is a large amount of information on the web which prompts patients to seek surgery for minor and often unrelated symptoms.
"Some surgeons are prepared to offer an operation and there the controversy starts, because surgery for these deep-seated cysts is not without significant risks," he added.
There are no current plans to offer the surgery to NHS patients.
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