<unk>  is a rare syndrome characterised by multiple  polyps of the digestive tract. It is sporadic (i.e. it does not seem to be a hereditary disease), and it is currently considered idiopathic (i.e. cause remains unknown).
Cronkhite–Canada disease
Sneddon-Wilkinson disease
Fox-Fordyce disease
Wilson's disease
Woodhouse-Sakati syndrome
Guam disease
Sakati-Nyhan-Tisdale syndrome
Kimura disease