Patient's question:
What kinds of diseases can pediatric surgery treat, and which symptoms belong to pediatric internal medicine? How long does it take for a baby's soft spot to close at the latest?Doctor's answer:
The fontanelle refers to the two soft, bony "skylights" on a baby's head at birth, medically known as "fontanelles." The posterior fontanelle typically closes within 3 months after birth, while the anterior fontanelle usually remains open until around 18 months of age. The "skylight" or "fontanelle" commonly mentioned refers to the anterior fontanelle. It reaches its maximum size of about 2.5-3 centimeters around 6 months of age. As the cranial bones gradually ossify, the anterior fontanelle gradually decreases in size. In some children, the anterior fontanelle may close by the time they are 1 year old, and it should close by no later than 18 months of age.