The FG syndrome is a distinctive genetic disorder which is characterized by
mental retardation,hypotonia, anal stenosis and/or obstipation, macrocepha
ly and characteristic facial anomalies. The first description by J.M. Opitz
and E.G. Kaveggia of the syndrome was in 1974. The inheritance is X-linked
. The pathogenesis is not clear to date. FG are the initials of the first p
ublished family. FG syndrome is described here as a case report, a review o
f the literature is given.