Endoscopic Resection of Skull Base Teratoma in Klippel-Feil Syndrome through Use of Combined Ultrasonic and Bipolar Diathermy Platforms

Figure 3

Magnetic resonance imaging (MRI) of pedunculated skull base lesion. (a) Coronal T1 MRI clearly demonstrates the tumor extending from intracranial midline defect into the nasopharynx. The bright intensity signal within the tumor (T) and stalk between the sphenoid sinuses (S) on T1 sequence represents fat, nearly pathognomonic of teratoma. Pituitary duplication (P with arrows) is best appreciated on T1 imaging as well. Of note, the left sphenoid sinus was noted to have mucosal thickening at the time of MRI compared to CT imaging (Figure 2). (b) Coronal T2 sequence at same slice location highlights the enlarged midline basilar cistern (Cis) with hyperintense signal representing cerebrospinal fluid.

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