Rieger syndrome is a genetically and phenotypically heterogeneous diso
rder typically characterized by malformations of the eyes, teeth, and
umbilicus. The syndrome is inherited as an autosomal dominant trait an
d exhibits significant variable expressivity. One locus associated wit
h this disorder has been mapped to 4q25. Using a large four-generation
pedigree, we have identified a second locus for Rieger syndrome locat
ed on chromosome 13q14.