Background: Dermoid cysts (DCs) reportedly occur at the suture line of the skull. We report a case of DC arising from the sphenofrontal suture, and provide a summary of DCs from the sphenofrontal suture on cranial invasion reported in the literature.
Case: The patient was a two year old boy. His tumor was located at the sphenofrontal suture and invaded the bone of the skull, and was surgically removed. We performed CT and MRI. They showed DC from the subcutaneous layer to full thickness of the bone. Recurrence occurred, and so a second operation was performed.
Consideration: We summarized DCs from the sphenofrontal suture reported in the world, their degree of bone invasion, and evaluation methods. DCs from the sphenofrontal suture are rare, and relatively frequently invade bones. Therefore, we prefer to perform CT or MRI for preoperative diagnosis.
Conclusion: DCs from the sphenofrontal suture are rare. Their preoperative evaluations are important because they are prone to invade bones.
