The skull grows upwards in a tower shape

The base of the skull is depressed, the orbits become shallower, the eyeballs protrude, and the paranasal sinus is dysplastic. As the brain tissue extends vertically, the upper and lower diameters of the skull increase, the anterior and posterior diameters become shorter, and the anterior cranial fossa can be shortened to 1.5 cm. Small, short orbital fissures in the orbital fissure significantly increased the delay of the sacral enlargement and anterior condylar closure. The scalloped frontal bone retracts or spins back, so that the frontal bone is connected with the nasal spine, and the frontal nose angle disappears. A typical case is a cranial apical process. Frontal posterior rotation is the main cause of cranial deformity, and the middle face can be normal. It is worth pointing out that apical deformities do not show obvious clinical manifestations before the age of 2 to 3 years, because many cases have normal skulls at the age of 1 and typical apical deformities only appear at the age of 4 years. True acne malformations with hand or foot and finger / toe deformities are called Saethre-Chotzen syndrome. Fatty cartilage dysplasia manifests as cartilage dysplasia, optic nerve atrophy, wide and flat head and nose, and thick lips. It also belongs to the apex deformity, which is common in infants and young children. Shortened arms and lower limbs are accompanied by mental retardation and visual impairment The cornea has lipid deposits.