Endorectal ultrasonography versus phased-array magnetic resonance imaging for preoperative staging of rectal cancer

Table 1 Depth of transmural tumor invasion (T staging): Comparison of phased-array MRI and histopathologic findings

	p-T1	p-T2	p-T3	p-T4
MR-T1	1	0	0	0
MR-T2	0	5	1	0
MR-T3	0	4	18	0
MR-T4	0	0	2	3
No	1	9	21	3

MR-T: T staging evaluation by phased-array MRI; p-T: Pathological T staging; No: Number of cases.

Table 2 Depth of transmural tumor invasion (T staging): Comparison of ERUS and histopathologic findings

	p-T1	p-T2	p-T3	p-T4
ERUS-T1	0	0	0	0
ERUS-T2	1	4	3	0
ERUS-T3	0	5	18	1
ERUS-T4	0	0	0	2
No	1	9	21	3

ERUS-T: T staging evaluation by ERUS; p-T: Pathological T staging; No: Number of cases.

Table 3 Phased-array MRI and ERUS in detecting lymph node metastases

	Pathology
	N0	N1	N2
Phased-array MRI
N0	8	1	1
N1	11	8	0
N2	0	0	5
ERUS
N0	7	2	2
N1	12	7	0
N2	0	0	4

Table 4 Comparison of overstaged and understaged cases by MRI and ERUS

	T staged		N staged
	Overstaged	Understaged	Overstaged	Understaged
MRI	6	1	11	2
ERUS	6	4	12	4