Trisomy 9 mosaicism with punctate mineralization in developing cartilages.

A case of mosaic trisomy 9 (46,XX/47,XX,+9) is described. The main clinical findings included intrauterine growth retardation, failure to thrive, hydrocephalus, deeply set eyes, prominent antihelix, highly arched palate, subluxation of the interphalangeal joints of some fingers, hip dislocation, excessive sweating, and punctate mineralization in developing cartilages.