Endoscopic resection of benign esophageal schwannoma: Three case reports and review of literature

Table 1 Clinicoradiological characteristics of reported cases of esophageal schwannoma treated using endoscopic techniques

Case	Ref.	Age in yr/sex	Presenting symptom	Mass location	EUS finding	Tumor size in mm	Treatment	Malignant findings
1	Koizumi et al[10], Japan	55/M	None	Ae	Not known	22 × 15	Endoscopic resection	-
2	Konishi et al[11], Japan	79/M	None	Mt	Not known	< 5	Endoscopic resection	-
3	Naus et al[12]	39/M	Epigastric pain (not felt because of lesion)	Lt	Not performed	1 × 1	Endoscopic removal	-
4	Shimamura et al[15]	59/M	Intermittent acid reflux symptoms (not felt because of lesion)	Ae	Not performed	5 × 5	Endoscopic resection	-
5	Trindade et al[16]	54/M	Esophageal reflux disease	Lt	Hypoechoic heterogeneous lesion in the 2nd layer of the gastrointestinal tract	6 × 6	Endoscopic mucosal resection	-
6	Our case 1	59/M	Upper abdominal distension and esophageal reflux disease	Lt	Hypoechoic, homogeneous, exogenous pseudopodal echo, originating in the muscular layer, misdiagnosed as leiomyoma	14 × 5	ESE	-
7	Our case 2	51/F	Discontinuous upper abdominal discomfort	Mt	Hypoechoic, homogeneous and well-defined. Originating in the muscular layer. The blood flow was not obvious and the lesion was near the aorta. Misdiagnosed as leiomyoma	18 × 20	STER	-
8	Our case 3	50/M	Dysphagia	Lt	Originating in the muscular layer, misdiagnosed as cystic solid tumor. Diagnosed with CT as neurogenic tumor or gastrointestinal stromal tumor	28 × 22	STERThe lesion was resected in a piecemeal fashion.	-

Ae: Abdominal esophagus; Ce: Cervical esophagus; CT: Computed tomography; ESE: Endoscopic submucosal excision; EUS: Endoscopic ultrasound; Lt: Lower thoracic esophagus; Mt: Middle thoracic esophagus; STER: Submucosal tunneling endoscopic resection; Ut: Upper thoracic esophagus.