The ectodermal dysplasia syndrome is also known as Ellis-vanCreveld congenital malformation syndrome, congenital calcification disorder heart disease syndrome, ectodermal dysplasia syndrome and other health searches, as autosomal recessive disorders snipe, manifesting as short-limbed dwarf snipe, often with congenital heart disease and mental retardation. The newborn infant appears dwarf state, such as short and thick long bones of the limbs, distal fingers (toes) are particularly small, and can appear multiple fingers (toes), hair, poor dental development, the whole body long bone epiphysis calcification is incomplete. What are the symptoms that can be confused? 1. Dwarfism Anyone whose height is less than 30% of the standard height of a child of the same race, age, or sex, or whose adult height is below 120 cm, is called dwarfism or dwarf body type. Dwarfism results in delayed physical growth due to insufficient secretion of growth hormone from a variety of causes. The causes of dwarfism can be attributed to both congenital and acquired factors. The congenital factors mostly affect the growth and development of the fetus due to the deficiency of essence and blood of the parents, and most of them are related to heredity. 2, cretinism hypopituitarism chondrodysplasia organic developmental disorders. It is caused by low thyroid function. Patients have low intelligence, slow mental development, dough-like puffiness of the skin, i.e. mucinous edema, and abnormally short body due to delayed ossification process. 3. Cretinism Cretinism occurs in areas where goiter is prevalent, and cretinism caused by embryonic iodine deficiency is called endemic cretinism. Iodine is a raw material necessary for the thyroid gland to synthesize thyroxine. In areas where iodine is deficient for consumption, many adults suffer from iodine deficiency, causing goiter. After 4 months of embryonic life, the thyroid gland is capable of synthesizing thyroxine. However, iodine deficiency in the mother and insufficient iodine supply to the fetus will inevitably lead to insufficient synthesis of thyroxine during the fetal period, which will seriously affect the development of the fetal central nervous system, especially the brain. If iodine is not replenished in time, irreversible damage to the nervous system will result. 4, rickets Rickets is caused by vitamin D deficiency, they can promote the absorption of calcium and phosphorus by the small intestinal mucosa and reduce calcium and phosphorus excretion from the urine. And can promote the maturation of bone-like tissue, so that calcium and phosphorus in the blood to the bone growth sites deposited to form new bone. There are two types of vitamin D, endogenous and exogenous. The endogenous one is synthesized in the body by the ultraviolet radiation of sunlight on the skin; the exogenous one comes from food, such as fish, liver, eggs, dairy, etc., which contain vitamin D3. In addition, ergosterol in plants is formed into vitamin D2 after ultraviolet radiation.