Table 3. Comparison of predictive accuracy for identifying the origin of Inverted papilloma between Gd-T1WI and T2WI based on surgical findings

	Gd-T1WI	T2WI	p-value
Correct*	21 (41.2%)	43 (84.3%)
Incorrect†	30 (58.8%)	8 (15.7%)	<0.001
Total	51	51

MRI prediction of the origin of Inverted papilloma matched the surgically confirmed origin site.
MRI prediction did not match the surgically confirmed origin site.Gd-T1WI: Gd-enhanced T1-weighted images, T2WI: T2-weighted image.