Gastric endoscopic submucosal dissection as a treatment for early neoplasia and for accurate staging of early cancers in a United Kingdom Caucasian population

Table 4 Results of endoscopic submucosal dissection n (%)

Variable	Value, n = 21
Average number of ESD per patient (including failed ESD)	1.3
Number of en-bloc resections	15 (71.4)
Number of pieces in which lesions were resected
Mean ± SD	1.5 ± 1.4
Range	1-7
Unspecified but > 1	2
Rate of complete resection on endoscopy	19 (90.5)
Rate of complete resection on histology	8 (38.1)
Margins clear on histology of ESD specimen
Both VM and HM	8 (38.1)
VM only	1 (4.8)
HM only	1 (4.8)
Neither VM nor HM	1 (4.8)
Not specified or difficult to interpret specimen due to coagulation effect/poor preservation of tissue	10 (47.6)

ESD: Endoscopic submucosal dissection.