Klippel-Feil syndrome (KFS) is associated with numerous craniofacial abnormalities but rarely with skull base tumor formation. We report an unusual and dramatic case of a symptomatic. mature skull base teratoma in an adult patient with KFS. with extension through the basisphenoid to obstruct the nasopharynx. https://www.mabelandfoxs.shop/product-category/picture-frame/