NASSAU, Bahamas (AFP) - Officials in the Bahamas who conducted an autopsy Monday on Jett Travolta said the 16-year-old son of actor John Travolta died here last week of a "seizure," and that his body showed no signs of head trauma. The autopsy results appear to contradict statements from the boy's family and island police that he had hit his head in the bathroom. Jett Travolta was last seen on New Year's Day when he went to use the bathroom at the family's residence at the Old Bahama Bay Resort on Grand Bahama Island, a statement issued Sunday by the Bahamas' police Chief Superintendent Basil Rahming said. Jett Travolta had a history of seizures since he was a toddler, and a lawyer for his father said he may have suffered a lethal one on Friday. Citing the assistant director of a funeral home that carried out the autopsy, TMZ.com said Jett Travolta's death certificate listed "seizure" as the cause of death. "The body was in great condition and shows no sign of head trauma," the funeral home official added. Because there was no foul play, the body was released immediately to the Travolta family, People magazine said on its website. Jett Travolta is due to be buried in Ocala, Florida, where his family lives. The youth was the only son of Travolta, 54, and actress Kelly Preston, 46. The couple also has an eight-year-old daughter, Ella. Hours before the autopsy was conducted, the teen's grieving family issued a statement about the loss. "Jett was the most wonderful son that two parents could ever ask for and lit up the lives of everyone he encountered. We are heartbroken that our time with him was so brief," the family said in a statement Sunday. "We have received many messages of condolence from around the world and we want to thank everyone for their prayers and support. It has meant so much to us," the statement said, signed: "With love, John, Kelly and Ella." The youngster's life was complicated by health woes from a young age. His mother, who like her husband is a member of the Church of Scientology, had "credited a detoxification program based on the writings of Scientology founder L. Ron Hubbard with helping to improve Jett's health," according to People Magazine. His father, meanwhile, has denied reports that his son was autistic, but said that at age two, Jett had Kawasaki Syndrome, a condition that can lead to heart disease, US media reported. A vascular illness in which the blood vessels are inflamed, Kawasaki Syndrome occurs almost exclusively in infants and toddlers, Robert Baltimore, a professor in pediatrics at Yale University's school of medicine, told AFP. Symptoms include prolonged fever, often a rash, red lips and tongue, and sometimes arthritis and behavioral changes, said Baltimore, who is a specialist in Kawasaki Syndrome. But the illness, the cause of which is not known, does not usually result in seizures, does not continue for many years, and rarely recurs, Baltimore said. Treatments given Jett Travolta, as reported by US media, "are not part of what I would call conventional treatment for Kawasaki disease," he added. No information was available about the type of treatment Jett Travolta received when he was diagnosed with Kawasaki Syndrome or for his seizures. A Church of Scientology spokeswoman told AFP the church has no teachings on what medical care members should seek and "absolutely does not prevent people from seeking medical treatment."