A Case of Mature Cystic Teratoma of the Floor of Mouth With Cleft Palate in Newborn.

Dermoid cysts, also known as mature cystic teratomas (MCTs), are congenital tumors that originate from all 3 germ layers. While commonly found in the ovary or testis, they are rare occurrences in the floor of the mouth. This case report describes a rare case of neonatal cleft palate with MCT of the floor of the mouth. The report provides a comprehensive analysis of the clinical manifestations, imaging characteristics, pathological findings, and surgical management strategies employed in this rare case to enhance clinicians' knowledge regarding uncommon tumors in the head and neck of newborns. Through the discussion of this case, the importance of preoperative evaluation, rapid intraoperative diagnosis, and long-term postoperative follow-up is further emphasized.