A Case of Dermoid Cyst Over the Anterior Fontanel

Abstract

The dermoid cyst is a congenital and benign lesion, which often locates in the scalp. However, a dermoid cyst over the anterior fontanel is relatively rare. An 18-month-old female was admitted to our hospital. At the age of 2 months of her life, a subcutaneous mass over the anterior fontanel was noticed by her mother. MRI showed a low-intensity lesion on the T1-weighted images, and a high-intensity lesion on the T2-weighted images. The cyst was removed because it had gradually enlarged. The cyst, 3 cm in diameter, was observed underneath the pericranium. Histopathological examination revealed that the cyst was a dermoid cyst. CT and MRI are thought to be essential for preoperative evaluation. We excised the tumor safely in cooperation with neurosurgeons.