unusual and rare teratomas of the head and neck: a report of three cases

teratomas are bulky lesions that rarely occur in the head and neck regions.they are composed of tissues from all germ layers with varying degrees of differentiation. they arise from pluripotential stem cells and ectopic embryonic non-germ cells. the most common sites of occurrence in the head and neck are the cervical region and the nasopharynx. three cases of these tumors are reported here that were found in the nasopharynx, cervical region and the base of the tongue.