Following vaginal birth, a neonate has a large area of diffuse swelling over the left occiput that crosses the sagittal suture line. When discussing this finding with the neonate's parents, which statements by a nurse are accurate?
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1. "No treatment will be required to resolve swelling."
2. "Due to the swelling, hyperbilirubinemia may occur."
3. "The swelling lies above the periosteum that covers the skull bone."
4. "Pressure on the fetal head before delivery caused the swelling."
5. "Your infant has a collection of blood under the skull bone."