- Delineation of a contiguous gene syndrome with multiple exostoses, enlarged parietal foramina, craniofacial dysostosis, and mental retardation, caused by deletions in the short arm of chromosome 11. Bartsch, O., Wuyts, W., Van Hul, W., Hecht, J.T., Meinecke, P., Hogue, D., Werner, W., Zabel, B., Hinkel, G.K., Powell, C.M., Shaffer, L.G., Willems, P.J. Am. J. Hum. Genet. (1996)