Convex palate is a clinical manifestation of craniosynostosis in Marfontein syndrome. The disease is inherited in an autosomal dominant manner, and Dietz et al. (1991) located the gene for the disease at 15q15 to q21.3 by linkage analysis of families. In many tissues of the body such as the endocardium, cardiac valves, large blood vessels, and bones, there is an accumulation of mucopolysaccharides, such as chondroitin sulphate A or C, which affect the structure and function of elastin fibers and other connective tissue fibers, causing the corresponding organs to Dysplasia and abnormal functioning of the corresponding organs. The diagnosis can be confirmed by three of the following four clinical criteria, and incomplete equine syndrome can be diagnosed by the presence of only two of the first three changes. 1. Special skeletal changes, i.e., elongated tubular bones, especially in the fingers and metacarpals. The bone cortex is thin and slender, showing spider finger-like changes. 2.Congenital cardiovascular anomalies. Ocular symptoms. 4.Family history.