BACKGROUND Radiotherapy or chemoradiotherapy is widely used for the treatment of rectal cancer preoperatively.Although the combination of radiotherapy and chemotherapy as an established preoperative neoadjuvant therap...BACKGROUND Radiotherapy or chemoradiotherapy is widely used for the treatment of rectal cancer preoperatively.Although the combination of radiotherapy and chemotherapy as an established preoperative neoadjuvant therapy shows high efficacy in the treatment of rectal cancer,some patients experience a response of poor tolerance and outcomes due to the long duration radiotherapy.The study compared short duration radiotherapy plus chemotherapy vs long duration radiotherapy plus chemotherapy for rectal cancer to determine whether short duration radiation treatment should be considered to diminish complications,reduce risk of recurrence and improve survival in patients with rectal cancer.AIM To evaluate the efficacy and safety of short duration radiotherapy combined with chemotherapy for the treatment of advanced rectal cancer.METHODS One hundred patients with stage IIIB or higher severe rectal cancer were selected as the study subjects at The First Affiliated Hospital of Hebei North University between December 2018 and December 2019.The patients were assigned to different groups based on the treatment regimens.Fifty patients who received preoperative short durations of radiotherapy plus chemotherapy were enrolled in an observation group and fifty patients who received conventional radiotherapy and chemotherapy were enrolled in a control group.Colonoscopic biopsy was performed for all patients with pathological diagnosis of rectal cancer.The expression of tumor-related factors such as RUNX3 and Ki-67 was quantitatively analyzed using immunohistochemistry in the tissues of the patients before and after treatment.Moreover,the duration of procedure,the amount of bleeding during the operation,the anus-conserving rate,the incidence of postoperative complications(wound infection,anastomotic leakage,postoperative intestinal obstruction,etc.)and postoperative pathology were compared between the two groups.The overall survival rate,recurrence rate and distant metastasis rate were also compared through postoperative reexamination and regular follow-up.RESULTS There was no significant difference in the positive expression rate of RUNX3 and Ki-67 between the two groups before the treatment(P>0.05).Compared with the pretreatment value,the positive rate of RUNX3 was increased and the positive rate of Ki-67 was decreased in both groups after the treatment(all P<0.05).The incidence of leukopenia,thrombocytopenia,neutropenia and diarrhea were higher in the observation group than in the control group(all P<0.05).There was no significant difference in the incidence of anemia,fatigue,neurotoxicity and nausea and vomiting between the two groups(all P>0.05).No significant difference was observed in the duration of procedure,intraoperative bleeding,the anus-conserving rate and the incidence of postoperative complications between the two groups(P>0.05).After 1 year of follow-up,the 1-yr survival rate was 80.0%in the observation group and 68.0%in the control group,the recurrence rate was 8.0%in the observation group and 10.0%in the control group,the distant metastasis rate was 6.0%in the observation group and 8.0%in the control group difference(all P<0.05).CONCLUSION Short duration radiotherapy combined with chemotherapy can improve the cure rate,prolong the survival time and reduce the incidence of complications in patients with advanced rectal cancer.展开更多
Despite advances in the management of patients with locally advanced, non-metastatic rectal adenocarcinoma (LARC), prognosis remains largely unsatisfactory due to a high rate of distant relapse. In fact, currently ava...Despite advances in the management of patients with locally advanced, non-metastatic rectal adenocarcinoma (LARC), prognosis remains largely unsatisfactory due to a high rate of distant relapse. In fact, currently available neoadjuvant protocols, represented by fluoropyrimidine-based chemo-radiotherapy (CT-RT) or short-course RT, together with improved surgical techniques, have largely reduced the risk of local relapse, with limited impact on distant recurrence. Available results of phase III trials with additional cytotoxic agents combined with standard CT-RT are disappointing, as no significant reduction in the risk of recurrence has been demonstrated. In order to improve the control of micrometastatic disease, integrating targeted agents into neoadjuvant treatment protocols thus offers a rational approach. In particular, the antiangiogenic agent bevacizumab has demonstrated synergistic activity with both CT and RT in pre-clinical and clinical models, and thus may represent a suitable companion in the neoadjuvant treatment of LARC. Preliminary results of phase I-II clinical studies are promising and suggest potential clinical parameters and molecular predictive biomarkers useful for patient selection: treatment personalization is indeed the key in order to maximize the benefit while reducing the risk of more complex neoadjuvant treatment schedules.展开更多
Fifteen percent to twenty-five percent of patients affected by colorectal cancer presents with liver metastases at diagnosis. In resectable cases, surgery is the only potentially curative treatment and achieves surviv...Fifteen percent to twenty-five percent of patients affected by colorectal cancer presents with liver metastases at diagnosis. In resectable cases, surgery is the only potentially curative treatment and achieves survival rates up to 50% at 5 years. Management is complex, as colorectal resection, liver resection, chemotherapy, and, in locally advanced mid/low rectal tumors, radiotherapy have to be integrated. Modern medical practice usually relies on evidence-based protocols. Levels of evidence for synchronous metastases are poor:published studies include few recent prospective series and several retrospective analyses collecting a limited number of patients across long periods of time. Data are difficult to be generalized and are mainly representative of single centre's experience, biased by local recruitment, indications and surgical technique. In this context, surgeons have to renounce to "evidence-based medicine" and to adopt a sort of "experience-based medicine". Anyway, some suggestions are possible. Simultaneous colorectal and liver resection can be safely performed whenever minor hepatectomies are planned, while a case-by-case evaluation is mandatory in case of more complex procedures. Neoadjuvant chemotherapy is preferentially scheduled for patients with advanced metastatic tumors to assess disease biology and to control lesions. It can be safely performed with primarytumor in situ , even planning simultaneous resection at its end. Locally advanced mid/low rectal tumor represents a further indication to neoadjuvant therapies, even if treatment's schedule is not yet standardized. In summary, several issues have to be solved, but every single HPB centre should define its proper strategy to optimize patient's selection, disease control and safety and completeness of surgery.展开更多
基金The Key Science and Technology Program of Zhangjiakou,No.1921132H.
文摘BACKGROUND Radiotherapy or chemoradiotherapy is widely used for the treatment of rectal cancer preoperatively.Although the combination of radiotherapy and chemotherapy as an established preoperative neoadjuvant therapy shows high efficacy in the treatment of rectal cancer,some patients experience a response of poor tolerance and outcomes due to the long duration radiotherapy.The study compared short duration radiotherapy plus chemotherapy vs long duration radiotherapy plus chemotherapy for rectal cancer to determine whether short duration radiation treatment should be considered to diminish complications,reduce risk of recurrence and improve survival in patients with rectal cancer.AIM To evaluate the efficacy and safety of short duration radiotherapy combined with chemotherapy for the treatment of advanced rectal cancer.METHODS One hundred patients with stage IIIB or higher severe rectal cancer were selected as the study subjects at The First Affiliated Hospital of Hebei North University between December 2018 and December 2019.The patients were assigned to different groups based on the treatment regimens.Fifty patients who received preoperative short durations of radiotherapy plus chemotherapy were enrolled in an observation group and fifty patients who received conventional radiotherapy and chemotherapy were enrolled in a control group.Colonoscopic biopsy was performed for all patients with pathological diagnosis of rectal cancer.The expression of tumor-related factors such as RUNX3 and Ki-67 was quantitatively analyzed using immunohistochemistry in the tissues of the patients before and after treatment.Moreover,the duration of procedure,the amount of bleeding during the operation,the anus-conserving rate,the incidence of postoperative complications(wound infection,anastomotic leakage,postoperative intestinal obstruction,etc.)and postoperative pathology were compared between the two groups.The overall survival rate,recurrence rate and distant metastasis rate were also compared through postoperative reexamination and regular follow-up.RESULTS There was no significant difference in the positive expression rate of RUNX3 and Ki-67 between the two groups before the treatment(P>0.05).Compared with the pretreatment value,the positive rate of RUNX3 was increased and the positive rate of Ki-67 was decreased in both groups after the treatment(all P<0.05).The incidence of leukopenia,thrombocytopenia,neutropenia and diarrhea were higher in the observation group than in the control group(all P<0.05).There was no significant difference in the incidence of anemia,fatigue,neurotoxicity and nausea and vomiting between the two groups(all P>0.05).No significant difference was observed in the duration of procedure,intraoperative bleeding,the anus-conserving rate and the incidence of postoperative complications between the two groups(P>0.05).After 1 year of follow-up,the 1-yr survival rate was 80.0%in the observation group and 68.0%in the control group,the recurrence rate was 8.0%in the observation group and 10.0%in the control group,the distant metastasis rate was 6.0%in the observation group and 8.0%in the control group difference(all P<0.05).CONCLUSION Short duration radiotherapy combined with chemotherapy can improve the cure rate,prolong the survival time and reduce the incidence of complications in patients with advanced rectal cancer.
文摘Despite advances in the management of patients with locally advanced, non-metastatic rectal adenocarcinoma (LARC), prognosis remains largely unsatisfactory due to a high rate of distant relapse. In fact, currently available neoadjuvant protocols, represented by fluoropyrimidine-based chemo-radiotherapy (CT-RT) or short-course RT, together with improved surgical techniques, have largely reduced the risk of local relapse, with limited impact on distant recurrence. Available results of phase III trials with additional cytotoxic agents combined with standard CT-RT are disappointing, as no significant reduction in the risk of recurrence has been demonstrated. In order to improve the control of micrometastatic disease, integrating targeted agents into neoadjuvant treatment protocols thus offers a rational approach. In particular, the antiangiogenic agent bevacizumab has demonstrated synergistic activity with both CT and RT in pre-clinical and clinical models, and thus may represent a suitable companion in the neoadjuvant treatment of LARC. Preliminary results of phase I-II clinical studies are promising and suggest potential clinical parameters and molecular predictive biomarkers useful for patient selection: treatment personalization is indeed the key in order to maximize the benefit while reducing the risk of more complex neoadjuvant treatment schedules.
文摘Fifteen percent to twenty-five percent of patients affected by colorectal cancer presents with liver metastases at diagnosis. In resectable cases, surgery is the only potentially curative treatment and achieves survival rates up to 50% at 5 years. Management is complex, as colorectal resection, liver resection, chemotherapy, and, in locally advanced mid/low rectal tumors, radiotherapy have to be integrated. Modern medical practice usually relies on evidence-based protocols. Levels of evidence for synchronous metastases are poor:published studies include few recent prospective series and several retrospective analyses collecting a limited number of patients across long periods of time. Data are difficult to be generalized and are mainly representative of single centre's experience, biased by local recruitment, indications and surgical technique. In this context, surgeons have to renounce to "evidence-based medicine" and to adopt a sort of "experience-based medicine". Anyway, some suggestions are possible. Simultaneous colorectal and liver resection can be safely performed whenever minor hepatectomies are planned, while a case-by-case evaluation is mandatory in case of more complex procedures. Neoadjuvant chemotherapy is preferentially scheduled for patients with advanced metastatic tumors to assess disease biology and to control lesions. It can be safely performed with primarytumor in situ , even planning simultaneous resection at its end. Locally advanced mid/low rectal tumor represents a further indication to neoadjuvant therapies, even if treatment's schedule is not yet standardized. In summary, several issues have to be solved, but every single HPB centre should define its proper strategy to optimize patient's selection, disease control and safety and completeness of surgery.
