Table 3.
Oncologic Data for Laparoscopic and Robotic Groups
| Laparoscopic (n = 21) | Robotic (n = 21) | P Value | |
|---|---|---|---|
| Neoadjuvant chemoradiation | 13 (62%) | 18 (86%) | .21 |
| Median time from treatment to operation (mean, range) (d) | 68 (104, 38–517) | 68 (71, 40–170) | .87 |
| Location of tumor | |||
| Anal verge to 5 cm | 4 (19%) | 10 (48%) | .10 |
| 5.1–10 cm | 11 (52%) | 10 (48%) | >.99 |
| >10 cm | 6 (29%) | 1 (5%) | .09 |
| Median (mean, range) (cm) | 8 (9.6, 4–20) | 6 (6.5, 0–15) | .02a |
| Preoperative tumor grade | |||
| Well differentiated | 2 (10%) | 2 (10%) | >.99 |
| Moderately differentiated | 16 (76%) | 17 (81%) | >.99 |
| Poorly differentiated | 3 (14%) | 2 (10%) | >.99 |
| Tumor stage (postoperatively) | |||
| No residual disease | 3 (14%) | 2 (10%) | >.99 |
| Stage I | 7 (33%) | 5 (24%) | .73 |
| Stage II | 4 (19%) | 4 (19%) | >.99 |
| Stage III | 7 (33%) | 9 (43%) | .53 |
| Stage IV | 0 | 1 (5%) | >.99 |
| Median No. of lymph nodes harvested (mean, range) | 15 (14.8, 8–21) | 17 (19.7, 8–40) | .03a |
| Median No. of positive lymph nodes (mean, range) | 6 (5.1, 1–10) | 3 (3.7, 1–9) | .93 |
| No. of patients with positive lymph nodes | 7 (33%) | 10 (48%) | .53 |
| Median size of lesion (mean, range) (cm) | 2.5 (2.5, 0–8.1) | 1.5 (1.7, 0–6.5) | .34 |
| Median length of specimen (mean, range) (cm) | 23 (24.2, 15–35.5) | 27.1 (31.8, 17.5–110) | .0001a |
| Lymphovascular invasion | 8 (38%) | 8 (38%) | >.99 |
| Circumferential margin involvement | 1 (5%) | 0 | >.99 |
| Distal margin involvement | 1 (5%) | 0 | >.99 |
| Median distal margin distance (mean, range) (cm) | 5.5 (5.1, 0.5–8) | 3.9 (4.6, 1.0–18) | .48 |
a
Statistically significant.