The Mystery of a Boy Who Lost the Vision Center of His Brain But Can Still See 7 Years Later

The case of a 7-year-old Australian boy who was supposed to lose sight at two weeks old but can still see has stunned scientists.

Credit: Inaki-Carril Mundinano, Juan Chen, Mitchell de Souza, Marc G. Sarossy, Marc F. Joanisse, Melvyn A. Goodale, James A. Bourne.

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Scientific mystery: Man living with 90% of his brain missing

The man who lives a functional life with most of his brain filled with water challenges what we know about the brain.

A scan of the man missing 90% of his brain. Credit: Feuillet et al/The Lancet.

What we think we know about our brains is nothing compared to what we don't know. This fact is brought into focus by the medical mystery of a 44-year-old French father of two who found out one day that he had most of his brain missing. Instead his skull is mostly full of liquid, with almost no brain tissue left. He has a life-long condition known as hydrocephalus, commonly called “water on the brain" or “water head". It happens when too much cerebrospinal fluid puts pressure on the brain and the brain's cavities abnormally increase.

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