Esophageal mesenchymal tumors: Endoscopy, pathology and immunohistochemistry

Table 1 Clinical findings of 29 cases of esophageal mesenchymal tumors

Tumortype	n	Dysphagia	Heart burn/retrosternalpain	Hemorrhage	Stomachache	Asymptomatic
LMs	24	4	7	1	2	10
GISTs	5	1	1	1	0	2
Total	29	5	8	2	2	12

Tested by Fisher’s exact method, the differences of symptoms are not significant between esophageal LMs and GISTs (P > 0.05).

Table 2 Expression of CD117 in 29 cases of esophageal mesenchymal tumors

Tumor type	n	Positive rate (%)
GISTs	5	5
LMs	24	0
P < 0.003

Table 3 Expression of CD34 in 29 cases of esophageal mesenchymal tumors

Tumor type	n	Positive rate (%)
GISTs	5	3 (60)
LMs	24	0
P < 0.003

Table 4 Expression of SMA in 29 cases of esophageal mesenchymal tumors

Tumor type	n	Positive rate (%)
LMs	24	24 (100)
GISTs	5	2 (40)
P < 0.003

Table 5 Expression of desmin in 29 cases of esophageal mesenchymal tumors

Tumor type	n	Positive rate (%)
LMs	24	24 (100)
GISTs	5	1 (20)
P < 0.003