X-ray diagnosis of synchronous multiple primary carcinoma in the upper gastrointestinal tract

Table 3 Clinicopathological differences of esophageal lesions between esophageal multiple primary carcinoma and esophageal-gastric multiple primary carcinoma

	EMPC			EGMPC
	Total (n = 49)	First lesion	Second or third lesion	(n = 27)
Location
Upper	17	17	0	0
Middle	19	7	12	16
Lower	13	0	13	11
Largest dimension of lesions (cm)
mean ± SD1	4.33 ± 2.35	3.63 ± 1.96	5.00 ± 2.67	5.56 ± 2.34
95% CI	3.63-5.02	2.80-4.45	3.90-6.10	4.63-6.48
Morphology
Hyperplastic	23	11	12	11
Medullary	9	4	5	7
Ulcerative	7	5	2	5
Infiltrative	7	3	4	2
Mixed	3	0	3	2
Histology
Squamous cell carcinoma	49	24	25	26
Sarcoma	0	0	0	1
PT stage2
T1	12	9	3	13
T2-4	37	15	22	14

¹Largest dimension of esophageal lesions (cm) between first lesion and second lesion, t = 2.047, P = 0.046. Largest dimension of esophageal lesions (cm) between esophageal multiple primary carcinoma (EMPC) and esophageal-gastric multiple primary carcinoma (EGMPC), t = 2.139, P = 0.036;

²PT stage of esophageal lesions between first lesion and second lesion, χ² = 4.306 P = 0.038; PT stage of esophageal lesions between EMPC and EGMPC, χ² = 4.414, P = 0.036.