piecemeal resection


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piecemeal resection

Removal of a structure from the body, e.g., a polyp from the colon, in small bits or stages.
See also: resection
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There was a tendency of polyps larger than 20 mm, having a higher proportion of piecemeal resections (P = 0.055).
Table 5 summarizes the results of multivariate analysis of risk factors associated with piecemeal resection after EMR for colorectal LSTs.
Then, we evaluated the clinicopathological factors associated with en bloc or piecemeal resection after EMR for colorectal LSTs.
Total (n = 31) Distal Gastric gastrectomy conduit (n = 21) (n = 10) En bloc resection, n 28 (90) 19 (90) 9 (90) (%) Complete resection, n 24 (77) 16 (76) 8 (80) (%) Causes for incomplete 7 5 2 resection, n (%) Piecemeal resection 3 2 1 Horizontal 2 1 2 involvement Vertical involvement 2 2 0 Curative resectiona, n 22 (71) 15(71) 7 (70) (%) Median procedure time 25 (4-133) 26 (4-111) 25 (13-133) (min, range) Procedure-related adverse events, n (%) Bleeding 2(6) 1 (5) 1 (10) Perforation 1 (3) 0 (0) 1 (10) (a) Two completely resected cancers had deep submucosal invasion (> 500 [micro]m from the muscularis mucosa).
In a western retrospective study on the outcomes of EMR (including 46.2% cases of piecemeal resection) for colorectal lesions with a mean size of 23 mm, 30.4% were found to have recurrent or remnant lesions during follow-up (18).
Here, we aimed to reveal the factors affecting piecemeal resection of large ([greater than or equal to]20 mm) colorectal epithelial neoplasia, despite the application of ESD, and to investigate the long-term outcomes of piecemeal ESD cases relative to en bloc ESD by using data from a single center.
Actually, piecemeal resection by conventional EMR is generally considered the treatment of choice given the low chance that these lesions harbor malignancy [20, 21].
Curative resection (en bloc + piecemeal resection) was obtained in 22 out of 29 patients (76%) (Figure 2).
Piecemeal resection is associated with increased risk of incomplete resection and local recurrence [2, 3].
After piecemeal resection, histological assessment is mostly impossible and the risk of incomplete resection or recurrence increases.
Piecemeal resection of submucosal cancer lesions prevents reliable determination of the status of the resection margins.