Congenital huge submandibular and neck teratoid cyst in newborn.

Head and neck teratoid cysts are the least common congenital cysts in the head and neck region, accounting for approximately 1.8% of all dermoid cysts. Teratoid cysts exhibiting mesodermal elements may be lined by gastric, intestinal, respiratory, squamous, or cilitated epithelium. We present a case of huge submandibular and neck teratoid cyst in newborn with airway obstruction and feeding difficulty. Surgical extirpation is the treatment of choice. However, before operation, some other cystic diseases in the head and neck region needs to be excluded. Fine-needle aspiration biopsy was necessary in differential diagnosis of lesions before treatment, especially that the principle of treatment of those diseases is different.