Peculiar face, pectus carinatum and joint laxity in brother and sister.

This report describes a probably new syndrome seen in a brother and sister and characterized by joint laxity, pectus carinatum and a peculiar face with mild frontal bossing, low nasal bridge, lateral displacement of the inner malar hypoplasia, parrot-like nose, chubby cheeks, striking philtrum and arched upper lips.