Craniosynostosis is a medical condition that occurs when the bones of a baby's skull fuse together too early, leading to abnormal skull growth and potential brain development issues. Some synonyms for craniosynostosis include craniostenosis, cranial stenosis, and cranial vault stenosis. These terms all refer to the same underlying condition and describe the premature fusion of the skull bones. Other related terms include craniofacial anomalies and skull malformations. While craniosynostosis can be a serious condition with potential complications, it can often be treated effectively with surgery to correct the abnormal skull shape and allow for proper brain growth and development.