 He went to the MTV offices in New York, and could not recognize where he was.On August 17, Zamora checked into St. Vincent's Hospital and was diagnosed with toxoplasmosis, a condition that causes brain lesions, fatigue, headaches and confusion.Further tests revealed he had progressive multifocal leukoencephalopathy (PML), a very rare and usually fatal viral inflammation of the brain that disrupts the electrical impulses of the nervous system.