Adding further to the tragedy that was Robin Williams' death earlier this year is the new, emerging information that the comedian may have been suffering from a disease known as Lewy body dementia, which may have contributed to his ultimate decision to commit suicide.

According to TMZ, sources close to Robin's family have said that the actor was suffering from the disease. Described by the Mayo Clinic as "the second most common type of progressive dementia after Alzheimer's disease," it apparently "causes a progressive decline in mental abilities." When experienced in conjunction with Parkinson's disease (which Robin did suffer from), Lewy body dementia can also cause hallucinations in its victim, causing him to see and attempt to interact with things that aren't there.

TMZ goes on to report that these sources, as well as Robin's doctors, believe the disease was the main contributing factor in Robin's suicide. TMZ also claims to have documents that prove the late comedian was, in fact, suffering from Lewy body dementia.

The entertainment world was shocked and saddened when the legendary comedian was found dead earlier this year (Aug. 11) from an apparent suicide by asphyxia due to hanging.

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