The precise incidence of<unk>  syndrome is difficult to determine and we have no well established data to quote. The median age at presentation has been 51 years with the majority of the patients comprising of males. A median survival of 165 months has also been recorded. The precise incidence of<unk>  syndrome is difficult to determine due to the complexity of the syndrome presentation and we have no well established data regarding the incidence. Prevalence of<unk>  syndrome in Japan is reported to be about 0.3 per 100,000 individuals. There is no racial predilection to<unk>  syndrome. There is no well established data regarding the gender predilection of<unk>  syndrome. Data from Japan shows a male predilection of 2.5:1. The majority of<unk>  syndrome cases have been reported in Japan and China.
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