Osteosarcoma in a 16-year-old boy with Baller-Gerold syndrome.

We report a 16-year-old growth deficient boy with craniosynostosis, radial hypoplasia and hypoplastic thumbs. These findings are consistent with the autosomal recessively inherited Baller-Gerold syndrome (BGS) which furthermore shows a great variability of concomitant occasional anomalies. At the age of 16 years our patient suffered from an osteosarcoma of the left distal femur. The occurrence of malignancies has not yet been reported in the hitherto described 22 patients with BGS.