Skull fracture. The infant is G1P1 with a gestational age of 39+2 weeks, vaginal delivery, and birth weight of 3,940 g. He suffered from severe asphyxia at birth and was diagnosed with HIE and cranial hematoma on the top of the left head on admission. Brain ultrasound revealed that the continuity of the skull bone under the hematoma was interrupted, and the formation of broken ends with slight dislocation and separation was seen, which suggested the presence of a skull fracture.