CT and MR imaging for detecting neoplastic invasion of esophageal inlet

Table 1 Comparison of d-CV between control and patient groups on CT and MR imaging (mean±SD).

	CT		MRI
	Control group	Patient group	Control group	Patient group
n	40	30	30	19
mean±SD (cm)	0.94±0.15	1.24±0.32	0.91±0.18	1.31±0.36
t	4.806		4.544
P	<0.01		<0.01

Table 2 d-CV in different types of head and neck tumor with esophageal inlet involvement on CT and MR imaging (mean±SD).

Tumors	CT	MRI
Postcricoid carcinoma	1.25±0.31 cm	1.28±0.45 cm
(n=7)	(n=6)	(n=4)
Pyriform sinus carcinoma	1.14±0.25 cm	1.11±0.24 cm
(n=10)	(n=10)	(n=5)
Laryngeal carcinoma	1.18±0.33 cm	1.30±0.30 cm
(n=9)	(n=8)	(n=7)
Thyroid carcinoma	1.46±0.38 cm	1.72±0.39 cm
(n=6)	(n=6)	(n=3)

Table 3 Diagnostic statistics of d-CV criterion on CT and MRI for predicting neoplastic esophageal inlet involvement.

	Sensitivity (%)	Specificity (%)	Accuracy (%)	Positive predictivevalue (%)	Negative predictivevalue (%)
d-CV>1.0 cm on CT	73 (22 of 30)	83 (33 of 40)	79 (55 of 70)	76 (22 of 29)	80 (33 of 41)
d-CV>1.0 cm on MRI	84 (16 of 19)	77 (23 of 30)	80 (39 of 49)	70 (16 of 23)	88 (23 of 26)