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Table 2 Association of primary tumor extension and MSI

From: A new T classification based on masticator space involvement in nasopharyngeal carcinoma: a study of 742 cases with magnetic resonance imaging

Primary tumor extension MSI - MSI +  
  No. % No. % Pvalue
Intracranial 28 5.0 56 31.1 <0.001
Prevertebral space 213 38.0 156 86.7 <0.001
Base of skull bony structure 260 46.3 159 88.3 0.002
Paranasal sinuses 37 6.5 52 28.9 0.020
Parapharyngeal space 334 59.4 158 87.8 0.045