Preoperative imaging accuracy in size determination of prostate cancer in men undergoing radical prostatectomy for clinically localised disease

Insights into Imaging

Table 4 Distribution of underestimation in prostate cancer using mpMRI and USWE in lesions located at base, mid and apex level

Measurements	Underestimation	%	No underestimation	%	Pearson Chi-square	Degree of freedom	p value*
Lesions located at base level
MRI (n = 59)	50	84.7	9	15.3	3.637	1	0.0565
SWE (n = 64)	45	70.3	19	29.7
Lesions located at mid level
MRI (n = 121)	92	76.0	29	24.0	10.882	1	0.0010
SWE (n = 138)	78	56.5	60	43.5
Lesions located at apex level
MRI (n = 113)	84	74.3	29	25.7	9.017	1	0.0027
SWE (n = 134)	75	56.0	59	44.0

MRI magnetic resonance imaging, SWE shear wave elastography
*To make the result statistically significant, the adjusted p value for comparison is 0.0038