Skull growth fracture is a linear fracture of the skull with dural rupture caused by head trauma, and the fracture line is embedded in the dura mater, arachnoid, brain tissue or its composite scar, which affects the healing of the fracture, and with the fluctuating impact of cerebrospinal fluid and brain tissue, the fracture line gap is progressively enlarged, and the bone edge is turned out to form a lasting bone defect. It is a special type of fracture rarely seen in craniocerebral injury, mostly in infants and children, 50% occurring within 1 year of age, 90% within 3 years of age, and accounting for 0.05% to 0.60% of craniocerebral trauma in infants and children. The top of the head is the most common site, followed by the occipital and frontal areas, and the posterior cranial fossa, orbital roof, and septal sinus can also occur. The reason why infants and young children have this disease is probably related to the following factors: 1, infants and young children’s skull is thin: mainly composed of cortical, bone stretch and elasticity is very strong, but resistance to external forces is poor, because the child’s cranial suture has not been completely closed, when a part of the skull by the impact of external forces lack of effective buffering, easy to fracture; In addition, the dura mater and the inner surface of the skull in infancy and early childhood adhesion is very tight, fracture occurs The dura is not separated from the inner surface of the skull at the moment of fracture, but the closely adherent dura is torn, and the fracture suture gradually widens due to the local intracranial high pressure, and the herniation of cranial contents into it affects the fracture healing, which is the basic factor of skull growth fracture. 2. Infancy is the stage of rapid cranial growth and development: especially the growth of head circumference is very obvious in the first year after birth, and as the disease progresses, the pressure generated by brain development and brain fluctuation also plays a continuous slow erosion role on the fracture edge, so that the bone at the edge of the fracture line is destroyed and resorbed, and the bone defect gradually becomes larger, while there is a synergistic effect of intracranial pressure transmission effect, so that the intracranial pressure acts directly on the The synergistic effect of intracranial pressure transmission makes the intracranial pressure act directly on the fracture fracture (i.e., pressure reduction zone), which gradually causes the expansion of the arachnoid membrane, cerebrospinal fluid, brain tissue and even lateral ventricles, and is an important factor in accelerating the formation of skull growth fracture. 3, Infant skull fracture with epidural or subperiosteal hemorrhage: it can cause extensive separation between the periosteum and dura mater and skull, destroy the blood supply from the dura mater and periosteum, cause ischemia at the skull fracture line, delay or stop bone resorption and growth, resulting in widening of the fracture line or bone defect. 4.When the fracture line tears the dura: the arachnoid membrane there is prone to adhesion and arachnoid herniation and gradually form a cyst, this cyst has a semi-permeable membrane effect, cerebrospinal fluid into the capsule than from the capsule drainage, so the cyst gradually expand, resulting in fracture line widening, bone edge exostosis and bone defect, but also through the skull and dural defect outward herniation to the subcapsular tendon membrane, forming a pseudocyst, clinically manifested as a scalp swelling If there is local cerebral contusion, the contusion foci may evolve into cerebral softening, cerebral bulge, cystic degeneration and ventricular penetration malformation, and further prevent the healing of the fracture and aggravate the condition. Treatment principles include: 1, early surgery: remove the contents of the protrusion beyond the bone defect; 2, close repair of the broken dura and cranioplasty: dura is an important structural basis for the growth of the skull, intact dura can resist the protrusion of intracranial pressure, but also to promote the growth and healing of the skull, so for infants and children with cranial growth fractures to understand the integrity of the dura, if ruptured, it is appropriate to repair early or in At the time of craniosynostosis surgery, the dura mater is repaired to avoid skull growth fractures caused by imperfect dural repair caused by surgery.