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TABLE 2: Imaging features of NPCs
Patient Imaging Nasal Cavity Lateral Retropharyngeal Lymphadenopathy Neck Nodes Mastoid Opacification Petroclival Fissure Skull Base/Prevertebral Muscle Pterygopalatine Fossa Parapharyngeal Space Masticator Space Carotid Encasement Cavernous Sinus Sphenoid Sinus
1 CT, MR Involved NI Bilateral Yes NI Unilateral Unilateral Unilateral NI Yes Involved Involved
2 CT Posterior choana Bilateral Unilateral Yes Bilateral Unilateral NI Unilateral NI No NI Involved
3 CT NI Unilateral Bilateral Yes NI Unilateral NI NI NI No NI NI
4 MR Posterior choana Bilateral Unilateral Yes Unilateral Unilateral NI Unilateral Unilateral No NI NI
5 CT Involved Unilateral Unilateral Yes Unilateral Unilateral NI Unilateral NI No NI NI
6 CT, MR Posterior choana Unilateral Bilateral Yes Unilateral Unilateral NI NI NI No NI Involved
7 CT Posterior choana Unilateral Unilateral Yes Unilateral Unilateral Unilateral NI Unilateral No NI NI
8 CT, MR Posterior choana Unilateral Bilateral Yes NI Unilateral NI Unilateral NI No NI NI
9 MR NI Unilateral Bilateral Yes Unilateral Unilateral NI Unilateral NI No NI NI
10 CT, MR Posterior choana Bilateral Bilateral Yes Unilateral Unilateral NI NI NI No NI NI
11 MR Posterior choana Bilateral Bilateral Both Bilateral Unilateral NI NI NI No NI NI
Note—NI = not involved.