AU - NAGHIBZADEH, M TI - UNUSUAL AND RARE TERATOMAS OF THE HEAD AND NECK: A REPORT OF THREE CASES PT - JOURNAL ARTICLE TA - MJIRI JN - MJIRI VO - 12 VI - 1 IP - 1 4099 - http://mjiri.iums.ac.ir/article-1-1062-en.html 4100 - http://mjiri.iums.ac.ir/article-1-1062-en.pdf SO - MJIRI 1 ABĀ  - 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. CP - IRAN IN - LG - eng PB - MJIRI PG - 89 PT - case report YR - 1998