False-negative findings for skull base invasion by conventional CT images alone in a 74-year-old woman with nasopharyngeal carcinoma. False-negative findings.

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Presentation transcript:

False-negative findings for skull base invasion by conventional CT images alone in a 74-year-old woman with nasopharyngeal carcinoma. False-negative findings for skull base invasion by conventional CT images alone in a 74-year-old woman with nasopharyngeal carcinoma. A, Axial contrast-enhanced CCT image (soft-tissue window) shows nasopharyngeal tumor (T) spread into the lateral soft tissue around the foramen lacerum (arrowheads). CCT images at the skull base level (B, soft-tissue window; C, bone window) show no destruction of the skull base at the clivus (arrowhead). D, Bone subtraction iodine image shows remarkable skull base invasion into the bone marrow space such as the clivus, petrous apex, and sphenoid bone (arrowheads) with intracranial extension at the jugular foramen (arrow). A corresponding slice on a T1-weighted image (E) and fat-suppressed T1-weighted image after gadolinium administration (F) show tumor invading the clivus (arrowheads) and spread into the jugular foramen (arrow). T. Hiyama et al. AJNR Am J Neuroradiol 2019;40:135-141 ©2019 by American Society of Neuroradiology