ObjectiveTo investigate current status of anal sphincter preservation in low rectal cancer.MethodThe recent literatures on the progress of anal sphincter preservation in the low rectal cancer were reviewed.ResultsIn the past, the surgical treatment of the low rectal cancer was mainly based on the Miles. With the deepening of the anatomical understanding, the improvement of surgical concepts, and the development of minimally invasive techniques, the treatment concept of the low rectal cancer had gradually entered the era of retaining anal and anal function. At present, many surgical methods including the transanal local excision, intersphincteric resection, transanal total mesorectal excision, etc. could be applied to the anal sphincter preservation of the lower rectal cancer, but the advantages and disadvantages of each surgical procedure and the scope of application were slightly different.ConclusionsAlthough there are many surgical procedures that can be applied to patients with low rectal cancer, none of them can achieve perfection in terms of retaining anal and anal function, reducing complications and recurrence rates, and improving survival. It is believed that with continuous understanding of rectal anatomy by surgeons, emergence of various neoadjuvant chemoradiation and new devices, and more anal sphincter preservation procedures and even artificial anal surgery, treatment of low rectal cancer will also be more good care for anal and maintenance function, so that patients can obtain a higher quality and a long-term survival opportunity.
ObjectiveTo investigate factors associated with postoperative complications after laparoscopic radical surgery in rectal cancer.MethodsThe clinical data of patients with rectal cancer performed by the laparoscopic radical resection from February 2013 to December 2016 were analyzed retrospectively. All the data were analyzed by the t test, chi-square test or logistic regression analysis.ResultsThere were 343 patients with rectal cancer performed by the laparoscopic radical resection. The postoperative complications occurred in the 97 (28.3%) patients. The result of univariate analysis showed that the postoperative complications rate was associated with the gender, age, body mass index, preoperative anemia, preoperative comorbidity, location and diameter of tumor, operative time, and surgeon experience (all P<0.050). The results of logistic regression analysis revealed that the gender, age, body mass index, preoperative anemia, preoperative comorbidity, location of tumor, operative time, and surgeon experience were the independent risk factors for the postoperative complications (all P<0.050).ConclusionGender, age, body mass index, preoperative anemia, preoperative comorbidity, location of tumor, operative time, and surgeon experience are independent risk factors for postoperative complications in laparoscopic radical rectal surgery for rectal cancer.
Objective To explore the tumorigenicity and expressions of dishevelled 3 (DVL3) in HCT116 cells and HCT116 spherical cells. Methods Human colorectal tumor HCT116 cells were cultured in the serum-free culture medium for HCT116 spherical cells. Through the subcutaneous tumor experiment in nude mice and clone formation assay, we observed the tumor growth and colony formation ability of the two kinds of cells in vivo and in vitro. The Western blotting experiment was utilized to detect the expressions of DVL3 in these two kinds of cells. Results ① Colonyformation: the mean value of colony formation rate in the HCT116 cells group was 3.78%, and the mean value of fcolony formation rate in the HCT116 spherical cells group was 28.67%, which was higher in the HCT116 spherical cells group (t=21.16, P<0.05). ② Tumorigenicity in nude mice: 11 nude mice with tumor formation were observed in the HCT116 cells group, and the tumor formation rate was 55.0%; 18 nude mice with tumor formation were observed in the HCT116 spherical cells group, and the tumor formation rate was 90.0%, the tumor formation rate of the HCT116 spherical cells group was higher (P=0.039). The tumor volume of the HCT116 cells group was (92±31) mm3, and the tumor volume of HCT116 spherical cells group was (298±85) mm3, the tumor volume of the HCT116 spherical cells group was larger (t=9.27, P<0.05). ③ The expression of DVL3: the expression level of DVL3 in HCT116 cells was 0.12±0.05, and expression level of DVL3 in HCT116 spherical cells was 0.35±0.10, the expression level of DVL3 in HCT116 spherical cells was higher (t=4.31, P<0.05). Conclusions The HCT116 spherical cells have stronger colonization and tumorigenicity than the HCT116 cells. It has been speculatd that the high expression of DVL3 may be closely related with the stronger tumorigenicity.
Objective To investigate the difference of effect between laparoscopic and open surgery in patients with traumatic rupture of spleen. Methods The literatures on comparison of laparoscopic and open surgery in patients with traumatic rupture of spleen were retrieved in PubMed, Web of Science, CNKI, Wanfang, and VIP databases from Jan. 2007 to Jan. 2017, and then Stata 12.0 software was applied to present meta-analysis. Results ① The condition during operation: compared with the OS group, operative time of the LS group was shorter [SMD=–0.71, 95% CI was (–1.12, –0.30), P=0.001] and intraoperative blood loss of the LS group was less [SMD=–1.53, 95% CI was (–2.28, –0.78), P<0.001]. ② The postoperative condition: compared with the OS group, the postoperative anal exhaust time [SMD=–2.47, 95% CI was (–3.24, –1.70), P<0.001], postoperative ambulation time [SMD=–2.97, 95% CI was (–4.32, –1.62), P<0.001], and hospital stay [SMD=–1.68, 95% CI was (–2.15, –1.21), P<0.001] of the LS group were all shorter. ③ The overall incidence of complications and the incidence of complications: on the one hand, compared with the OS group, patients in the LS group had a lower overall incidence of postoperative complications [OR=0.29, 95% CI was (0.19, 0.43), P<0.001]. On the other hand, compared with the OS group, patients in the LS group had lower incidences of infection [OR=0.27, 95% CI was (0.13, 0.55), P<0.001], ascites [OR=0.36, 95% CI was (0.13, 1.00), P=0.049], bleeding [OR=0.29, 95% CI was (0.10, 0.90), P=0.032], ileus [OR=0.34, 95% CI was (0.13, 0.90), P=0.030], incision fat liquefaction [OR=0.27, 95% CI was (0.08, 0.94), P=0.040], and incision rupture [OR=0.17, 95% CI was (0.03, 0.96), P=0.045]. However, there was no statistical difference on splenectomy fever [OR=0.41, 95% CI was (0.13, 1.27), P=0.123], pancreatic fistula [OR=0.40, 95% CI was (0.06, 2.63), P=0.343], liver function lesion [OR=0.36, 95% CI was (0.10, 1.34), P=0.127], and thrombosis [OR=0.33, 95% CI was (0.09, 1.22), P=0.097] between the 2 groups. Conclusions Laparoscopic surgery can not only significantly reduce the incidence of multiple complications of traumatic rupture of spleen, but also can speed up the recovery rate of postoperative recovery. Therefore, it is safe and beneficial in treatment of patients with traumatic rupture of spleen.
Objective To compare efficacy of laparoscopic surgery and open surgery in treatment of rectal cancer after neoadjuvant chemoradiotherapy. Methods The relevant literatures were retrieved from databases including CNKI, CBM, Wanfang, VIP, PubMed, Cochrane Library, and Embase from 2007 to 2017, all the relevant randomized controlled trial (RCT) or non-randomized controlled trial (NRCT) of laparoscopic surgery versus open surgery in patients with rectal cancer were collected according to the inclusion and exclusion criterial. Two reviewers independently screened the literatures, extracted the data, and assessed the bias risk of the included studies. Then, the meta-analysis was performed using RevMan 5.3 software. Results A total of 11 RCTs and 9 NRCTs involving 2 036 patients with rectal cancer were included, of these, including 1 021 cases of laparoscopic surgery and 1 015 cases of open surgery. The results of the meta-analysis showed that the operation time was increased ［WMD=14.21, 95% CI (1.92, 26.51)］, the intraoperative blood loss ［WMD=–38.96, 95% CI (–60.29, –7.63)］, first postoperative exhaust time ［WMD=–0.86, 95% CI (–1.14, –0.57)］, first postoperative intake food time ［WMD=–0.89, 95% CI (–1.15, –0.62)］, and postoperative hospitalization time ［WMD=–2.38, 95% CI (–3.44, –1.32)］ were reduced in the laparoscopic surgery as compared with the open surgery; the rate of the sphincter-saving was increased ［OR=2.35, 95% CI (1.67, 3.30)］, the rates of the local recurrence ［OR=0.25, 95% CI (0.13, 0.47)］, postoperative overall complications ［OR=0.34, 95% CI (0.26, 0.43)］, infection of incision ［OR=0.39, 95% CI (0.25, 0.62)］, intestinal obstruction ［OR=0.30, 95% CI (0.17, 0.53)］, lung infection ［OR=0.32, 95% CI (0.18, 0.57)］, and anastomotic fistula ［OR=0.40, 95% CI (0.22, 0.73)］ were decreased in the laparoscopic surgery as compared with the open surgery; the intraoperative lymph node resection ［WMD=–0.99, 95% CI (–2.11, 0.12)］, the rates of the 3-year disease-free survival ［OR=0.91, 95% CI (0.54, 1.54)］, pelvic infection ［OR=0.64, 95% CI (0.17, 2.45)］, anastomotic bleeding ［OR=0.54, 95% CI (0.22, 1.34)］, urinary retention ［OR=0.71, 95% CI (0.34, 1.48)］, and urinary tract infection ［OR=1.22, 95% CI (0.45, 3.30)］ had no significant differences between these two surgeries. Conclusion Laparoscopy surgery is still safer, more effective, and more reliable than conventional open surgery after neoadjuvant chemoradiotherapy in rectal cancer, but it needs more clinical RCTs to further provide accurate and reliable results.