BACKGROUND Colorectal cancer ranks third and second among common and fatal cancers.The treatment of metastatic colorectal cancer(mCRC)is generally based on XELOX in clinical practice,which includes capecitabine(CAP)an...BACKGROUND Colorectal cancer ranks third and second among common and fatal cancers.The treatment of metastatic colorectal cancer(mCRC)is generally based on XELOX in clinical practice,which includes capecitabine(CAP)and oxaliplatin.Serum tumor markers carcinoembryonic antigen(CEA),carbohydrate antigen(CA)125 and CA199 are prognostic factors for various tumors.AIM To investigate evaluating combined bevacizumab(BEV)and XELOX in advanced colorectal cancer:Serum markers CEA,CA125,CA199 analysis.METHODS In this retrospective study,a total of 94 elderly patients diagnosed with mCRC were recruited and subsequently categorized into two groups based on the distinct treatment modalities they received.The control group was treated with XELOX plus CAP(n=47),while the observation group was treated with XELOX plus CAP and BEV(n=47).Several indexes were assessed in both groups,including disease control rate(DCR),incidence of adverse effects,serum marker levels(CEA,CA125,and CA19)and progression-free survival(PFS).RESULTS After 9 wk of treatment,the serum levels of CEA,CA199 and CA125 in the observation group were significantly lower than those in the control group(P<0.05).Moreover,the PFS of the observation group(9.12±0.90 mo)was significantly longer than that of the control group(6.49±0.64 mo).Meanwhile,there was no statistically significant difference in the incidence of adverse reactions and DCR between the two groups during maintenance therapy(P>0.05).CONCLUSION On the basis of XELOX treatment,the combination of BEV and CAP can reduce serum tumor marker levels and prolong PFS in patients with mCRC.展开更多
BACKGROUND Small cell lung cancer(SCLC)is a common and aggressive subtype of lung cancer.It is characterized by rapid growth and a high mortality rate.Approximately 10%of patients with SCLC present with brain metastas...BACKGROUND Small cell lung cancer(SCLC)is a common and aggressive subtype of lung cancer.It is characterized by rapid growth and a high mortality rate.Approximately 10%of patients with SCLC present with brain metastases at the time of diagnosis,which is associated with a median survival of 5 mo.This study aimed to summarize the effect of bevacizumab on the progression-free survival(PFS)and overall survival of patients with brain metastasis of SCLC.CASE SUMMARY A 62-year-old man was referred to our hospital in February 2023 because of dizziness and numbness of the right lower extremity without headache or fever for more than four weeks.The patient was diagnosed with limited-stage SCLC.He received 8 cycles of chemotherapy combined with maintenance bevacizumab therapy and achieved a PFS of over 7 mo.CONCLUSION The combination of bevacizumab and irinotecan effectively alleviated brain metastasis in SCLC and prolonged PFS.展开更多
BACKGROUND Pseudomyxoma peritonei(PMP)is a rare peritoneal malignant tumor syndrome.Cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy is its standard treatment.However,there are few studies...BACKGROUND Pseudomyxoma peritonei(PMP)is a rare peritoneal malignant tumor syndrome.Cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy is its standard treatment.However,there are few studies and insufficient evidence regarding systemic chemotherapy of advanced PMP.Regimens for colorectal cancer are often used clinically,but there is no uniform standard for late-stage treatment.AIM To determine if bevacizumab combined with cyclophosphamide and oxaliplatin(Bev+CTX+OXA)is effective for treatment of advanced PMP.The primary study endpoint was progression-free survival(PFS).METHODS Retrospective analysis was conducted on the clinical data of patients with advanced PMP who received Bev+CTX+OXA regimen(bevacizumab 7.5 mg/kg ivgtt d1,oxaliplatin 130 mg/m2 ivgtt d1 and cyclophosphamide 500 mg/m2 ivgtt d1,q3w)in our center from December 2015 to December 2020.Objective response rate(ORR),disease control rate(DCR)and incidence of adverse events were evaluated.PFS was followed up.Kaplan-Meier method was used to draw survival curve,and log-rank test was used for comparison between groups.Multivariate Cox proportional hazards regression model was used to analyze the independent influencing factors of PFS.RESULTS A total of 32 patients were enrolled.After 2 cycles,the ORR and DCR were 3.1%and 93.7%,respectively.The median follow-up time was 7.5 mo.During the follow-up period,14 patients(43.8%)had disease progression,and the median PFS was 8.9 mo.Stratified analysis showed that the PFS of patients with a preoperative increase in CA125(8.9 vs 2.1,P=0.022)and a completeness of cytoreduction score of 2-3(8.9 vs 5.0,P=0.043)was significantly longer than that of the control group.Multivariate analysis showed that a preoperative increase in CA125 was an independent prognostic factor for PFS(HR=0.245,95%CI:0.066-0.904,P=0.035).CONCLUSION Our retrospective assessment confirmed that the Bev+CTX+OXA regimen is effective in second-or posterior-line treatment of advanced PMP and that adverse reactions can be tolerated.A preoperative increase in CA125 is an independent prognostic factor of PFS.展开更多
Background:Although bevacizumab is an important treatment for metastatic colorectal cancer(CRC),not allpatients with CRC benefit from it;in unselected patient populations,only modest survival benefits have been report...Background:Although bevacizumab is an important treatment for metastatic colorectal cancer(CRC),not allpatients with CRC benefit from it;in unselected patient populations,only modest survival benefits have been reported.Methods:We evaluated clinical outcomes in 110 patients using comprehensive molecular characterization to identifybiomarkers for a response to bevacizumab-containing treatment.The molecular analysis comprised whole-exomesequencing,ribonucleic acid sequencing,and a methylation array on patient tissues.Results:Genomic and molecularcharacterization was successfully conducted in 103 patients.Six of 103 CRC samples were hypermutated,and none ofthe non-hypermutant tumors were microsatellite unstable.Among those 103 patients,89 had adenocarcinoma(ADC),15 were diagnosed with mucinous ADC,and six had signet-ring cell carcinoma(SRCC).Consensus molecular subtype(CMS)2 was unique to ADC.Of the four SRCCs,two were CMS1,one was CMS4,and the other was CMS3.APCmutation status was a significantly enriched factor in responders to bevacizumab treatment.Fibroblast growth factorreceptor(FGFR)1/2 signaling was upregulated in non-responders,whereas cell cycle,transfer ribonucleic acidprocessing,nucleotide excision repair,and oxidative phosphorylation pathways were enriched in responders.Inaddition,IGF1 was differentially expressed in non-responders(log2 fold change=−1.43,p=4.11×10^(−5),falsediscovery rate=0.098),and FLT1 was highly methylated in non-responders(p=7.55×10^(−3)).When the molecularpathways were reanalyzed separately according to the backbone chemotherapy(FOLFOX vs.FOLFIRI),thesignificance of the molecular pathways varied according to the backbone chemotherapy.Conclusions:This studysought a subset of CRC patients with a distinct clinical response to chemotherapy containing bevacizumab.Ourresults need to be validated in a large group of homogenous patient cohort and examined according to the differentchemotherapy backbones to create personalized therapeutic opportunities in CRC.展开更多
BACKGROUND The combination of atezolizumab(ATZ)and bevacizumab(BVZ)was approved as first-line systemic therapy for advanced hepatocellular carcinoma(HCC)owing to its superior rates of response and patient survival.How...BACKGROUND The combination of atezolizumab(ATZ)and bevacizumab(BVZ)was approved as first-line systemic therapy for advanced hepatocellular carcinoma(HCC)owing to its superior rates of response and patient survival.However,ATZ+BVZ is associated with increased risk of upper gastrointestinal(GI)bleeding,including arterial bleeding,which is rare and potentially fatal.We present a case of massive upper GI bleeding from a gastric pseudoaneurysm in a patient with advanced HCC who had been treated with ATZ+BVZ.CASE SUMMARY A 67-year-old man presented with severe upper GI bleeding after atezolizumab(ATZ)+bevacizumab(BVZ)therapy for HCC.Endoscopy failed to detect the bleeding site.Digital subtraction angiography revealed a gastric artery pseudoaneurysm and contrast extravasation from the inferior splenic artery and a branch of the left gastric artery.Successful hemostasis was achieved with embolization.CONCLUSION HCC patients who have been treated with ATZ+BVZ should be followed for 3 to 6 mo to monitor for development of massive GI bleeding.Diagnosis may require angiography.Embolization is an effective treatment.展开更多
BACKGROUND Colorectal cancer(CRC)is a highly prevalent malignancy of the digestive tract worldwide,characterized by a significant morbidity and mortality rate and subtle initial symptoms.Diarrhea,local abdominal pain,...BACKGROUND Colorectal cancer(CRC)is a highly prevalent malignancy of the digestive tract worldwide,characterized by a significant morbidity and mortality rate and subtle initial symptoms.Diarrhea,local abdominal pain,and hematochezia occur with the development of cancer,while systemic symptoms such as anemia and weight loss occur in patients with advanced CRC.Without timely interventions,the disease can have fatal consequences within a short span.The current therapeutic options for colon cancer include olaparib and bevacizumab,which are widely utilized.This study intends to evaluate the clinical efficacy of olaparib combined with bevacizumab in the treatment of advanced CRC,hoping to provide insights into advanced CRC treatment.AIM To investigate the retrospective efficacy of olaparib combined with bevacizumab in the treatment of advanced CRC.METHODS A retrospective analysis was conducted on a cohort of 82 patients with advanced colon cancer who were admitted to the First Affiliated Hospital of the University of South China between January 2018 and October 2019.Among them,43 patients subjected to the classical FOLFOX chemotherapy regimen were selected as the control group,and 39 patients undergoing treatment with olaparib combined with bevacizumab were selected as the observation group.Subsequent to different treatment regimens,the short-term efficacy,time to progression(TTP),and incidence rate of adverse reactions between the two groups were compared.Changes in serum-related indicators[vascular endothelial growth factor(VEGF),matrix metalloprotein-9(MMP-9),cyclooxygenase-2(COX-2)]and tumor markers[human epididymis protein 4(HE4),carbohydrate antigen 125(CA125),carbohydrate antigen 199(CA199)]levels before and after treatment were compared between the two groups at the same time.RESULTS The objective response rate was discovered to be 82.05%,and the disease control rate was 97.44%in the observation group,which were significantly higher than the respective rates of 58.14%and 83.72%in the control group(P<0.05).The median TTP was 24 mo(95%CI:19.987-28.005)in the control group and 37 mo(95%CI:30.854-43.870)in the observation group.The TTP in the observation group was significantly better than that in the control group,and the difference held statistical significance(log-rank test value=5.009,P=0.025).Before treatment,no substantial difference was detected in serum VEGF,MMP-9,and COX-2 levels and tumor markers HE4,CA125,and CA199 levels between the two groups(P>0.05).Following treatment with different regimens,the above indicators in the two groups were remarkably promoted(P<0.05),VEGF,MMP-9,and COX-2 in the observation group were lower than those in the control group(P<0.05),and HE4,CA125,and CA199 levels were also lower than those in the control group(P<0.05).Visà-vis the control group,the total incidence of gastrointestinal reactions,thrombosis,bone marrow suppression,liver and kidney function injury,and other adverse reactions in the observation group was notably lowered,with the difference considered statistically significant(P<0.05).CONCLUSION Olaparib combined with bevacizumab in the treatment of advanced CRC demonstrates a strong clinical effect of delaying disease progression and reducing the serum levels of VEGF,MMP-9,COX-2 and tumor markers HE4,CA125 and CA199.Moreover,given its fewer adverse reactions,it can be regarded as a safe and reliable treatment option.展开更多
Lung cancer is a malignant tumor with high incidence and mortality rates in China and worldwide.Approximately 10%of these diseases are caused by multiple primary non-small cell lung cancers(NSCLC).Traditional antitumo...Lung cancer is a malignant tumor with high incidence and mortality rates in China and worldwide.Approximately 10%of these diseases are caused by multiple primary non-small cell lung cancers(NSCLC).Traditional antitumor therapies,such as chemotherapy,radiotherapy,and targeted therapy,have limited efficacy in the treatment of advanced synchronous multiple primary NSCLC.Immunotherapy is considered the standard of care for advanced or recurrent NSCLC,however,approximately 60%of patients develop primary or secondary resistance to treatment.There are no standard recommendations for overcoming immune resistance.We describe a case of simultaneous multiple primary NSCLC in a patient who received programmed death factor-1(PD-1)inhibitor monotherapy and developed brain metastases.After receiving second-line treatment with a combination of another PD-1 inhibitor,pemetrexed,and bevacizumab,the patient achieved complete remission,although they experienced grade 3 immune-related adverse reactions.Immune re-challenge is safe and feasible,and choosing a synergistic combination regimen is one of the options to overcome immune resistance.A larger sample size is needed to confirm the effectiveness and safety of this strategy in patients with NSCLC resistant to prior PD-1 inhibitors.展开更多
文摘BACKGROUND Colorectal cancer ranks third and second among common and fatal cancers.The treatment of metastatic colorectal cancer(mCRC)is generally based on XELOX in clinical practice,which includes capecitabine(CAP)and oxaliplatin.Serum tumor markers carcinoembryonic antigen(CEA),carbohydrate antigen(CA)125 and CA199 are prognostic factors for various tumors.AIM To investigate evaluating combined bevacizumab(BEV)and XELOX in advanced colorectal cancer:Serum markers CEA,CA125,CA199 analysis.METHODS In this retrospective study,a total of 94 elderly patients diagnosed with mCRC were recruited and subsequently categorized into two groups based on the distinct treatment modalities they received.The control group was treated with XELOX plus CAP(n=47),while the observation group was treated with XELOX plus CAP and BEV(n=47).Several indexes were assessed in both groups,including disease control rate(DCR),incidence of adverse effects,serum marker levels(CEA,CA125,and CA19)and progression-free survival(PFS).RESULTS After 9 wk of treatment,the serum levels of CEA,CA199 and CA125 in the observation group were significantly lower than those in the control group(P<0.05).Moreover,the PFS of the observation group(9.12±0.90 mo)was significantly longer than that of the control group(6.49±0.64 mo).Meanwhile,there was no statistically significant difference in the incidence of adverse reactions and DCR between the two groups during maintenance therapy(P>0.05).CONCLUSION On the basis of XELOX treatment,the combination of BEV and CAP can reduce serum tumor marker levels and prolong PFS in patients with mCRC.
基金Yu-Qing Xia Famous Old Chinese Medicine Heritage Workshop of“3+3”Project of Traditional Chinese Medicine Heritage in Beijing,Jing Zhong Yi Ke Zi(2021),No.73National Natural Science Foundation of China,No.81973640+1 种基金Nursery Program of Wangjing Hospital,Chinese Academy of Traditional Chinese Medicine,No.WJYY-YJKT-2022-05China Academy of Traditional Chinese Medicine Wangjing Hospital High-Level Chinese Medicine Hospital Construction Project Chinese Medicine Clinical Evidence-Based Research:The Evidence-Based Research of Electrothermal Acupuncture for Relieving Cancer-Related Fatigue in Patients With Malignant Tumor,No.WYYY-XZKT-2023-20.
文摘BACKGROUND Small cell lung cancer(SCLC)is a common and aggressive subtype of lung cancer.It is characterized by rapid growth and a high mortality rate.Approximately 10%of patients with SCLC present with brain metastases at the time of diagnosis,which is associated with a median survival of 5 mo.This study aimed to summarize the effect of bevacizumab on the progression-free survival(PFS)and overall survival of patients with brain metastasis of SCLC.CASE SUMMARY A 62-year-old man was referred to our hospital in February 2023 because of dizziness and numbness of the right lower extremity without headache or fever for more than four weeks.The patient was diagnosed with limited-stage SCLC.He received 8 cycles of chemotherapy combined with maintenance bevacizumab therapy and achieved a PFS of over 7 mo.CONCLUSION The combination of bevacizumab and irinotecan effectively alleviated brain metastasis in SCLC and prolonged PFS.
基金Supported by Beijing Municipal Administration of Hospitals’Ascent Plan,No.DFL20180701and Beijing Municipal Grant for Medical Talents Group on Peritoneal Surface Oncology,No.2017400003235J007。
文摘BACKGROUND Pseudomyxoma peritonei(PMP)is a rare peritoneal malignant tumor syndrome.Cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy is its standard treatment.However,there are few studies and insufficient evidence regarding systemic chemotherapy of advanced PMP.Regimens for colorectal cancer are often used clinically,but there is no uniform standard for late-stage treatment.AIM To determine if bevacizumab combined with cyclophosphamide and oxaliplatin(Bev+CTX+OXA)is effective for treatment of advanced PMP.The primary study endpoint was progression-free survival(PFS).METHODS Retrospective analysis was conducted on the clinical data of patients with advanced PMP who received Bev+CTX+OXA regimen(bevacizumab 7.5 mg/kg ivgtt d1,oxaliplatin 130 mg/m2 ivgtt d1 and cyclophosphamide 500 mg/m2 ivgtt d1,q3w)in our center from December 2015 to December 2020.Objective response rate(ORR),disease control rate(DCR)and incidence of adverse events were evaluated.PFS was followed up.Kaplan-Meier method was used to draw survival curve,and log-rank test was used for comparison between groups.Multivariate Cox proportional hazards regression model was used to analyze the independent influencing factors of PFS.RESULTS A total of 32 patients were enrolled.After 2 cycles,the ORR and DCR were 3.1%and 93.7%,respectively.The median follow-up time was 7.5 mo.During the follow-up period,14 patients(43.8%)had disease progression,and the median PFS was 8.9 mo.Stratified analysis showed that the PFS of patients with a preoperative increase in CA125(8.9 vs 2.1,P=0.022)and a completeness of cytoreduction score of 2-3(8.9 vs 5.0,P=0.043)was significantly longer than that of the control group.Multivariate analysis showed that a preoperative increase in CA125 was an independent prognostic factor for PFS(HR=0.245,95%CI:0.066-0.904,P=0.035).CONCLUSION Our retrospective assessment confirmed that the Bev+CTX+OXA regimen is effective in second-or posterior-line treatment of advanced PMP and that adverse reactions can be tolerated.A preoperative increase in CA125 is an independent prognostic factor of PFS.
基金supported by a grant of the Korean Health Technology R&D Project through the Korean Health Industry Development Institute(KHIDI),funded by the Ministry of Health&Welfare,Republic of Korea(Grant Number:HR20C0025).
文摘Background:Although bevacizumab is an important treatment for metastatic colorectal cancer(CRC),not allpatients with CRC benefit from it;in unselected patient populations,only modest survival benefits have been reported.Methods:We evaluated clinical outcomes in 110 patients using comprehensive molecular characterization to identifybiomarkers for a response to bevacizumab-containing treatment.The molecular analysis comprised whole-exomesequencing,ribonucleic acid sequencing,and a methylation array on patient tissues.Results:Genomic and molecularcharacterization was successfully conducted in 103 patients.Six of 103 CRC samples were hypermutated,and none ofthe non-hypermutant tumors were microsatellite unstable.Among those 103 patients,89 had adenocarcinoma(ADC),15 were diagnosed with mucinous ADC,and six had signet-ring cell carcinoma(SRCC).Consensus molecular subtype(CMS)2 was unique to ADC.Of the four SRCCs,two were CMS1,one was CMS4,and the other was CMS3.APCmutation status was a significantly enriched factor in responders to bevacizumab treatment.Fibroblast growth factorreceptor(FGFR)1/2 signaling was upregulated in non-responders,whereas cell cycle,transfer ribonucleic acidprocessing,nucleotide excision repair,and oxidative phosphorylation pathways were enriched in responders.Inaddition,IGF1 was differentially expressed in non-responders(log2 fold change=−1.43,p=4.11×10^(−5),falsediscovery rate=0.098),and FLT1 was highly methylated in non-responders(p=7.55×10^(−3)).When the molecularpathways were reanalyzed separately according to the backbone chemotherapy(FOLFOX vs.FOLFIRI),thesignificance of the molecular pathways varied according to the backbone chemotherapy.Conclusions:This studysought a subset of CRC patients with a distinct clinical response to chemotherapy containing bevacizumab.Ourresults need to be validated in a large group of homogenous patient cohort and examined according to the differentchemotherapy backbones to create personalized therapeutic opportunities in CRC.
文摘BACKGROUND The combination of atezolizumab(ATZ)and bevacizumab(BVZ)was approved as first-line systemic therapy for advanced hepatocellular carcinoma(HCC)owing to its superior rates of response and patient survival.However,ATZ+BVZ is associated with increased risk of upper gastrointestinal(GI)bleeding,including arterial bleeding,which is rare and potentially fatal.We present a case of massive upper GI bleeding from a gastric pseudoaneurysm in a patient with advanced HCC who had been treated with ATZ+BVZ.CASE SUMMARY A 67-year-old man presented with severe upper GI bleeding after atezolizumab(ATZ)+bevacizumab(BVZ)therapy for HCC.Endoscopy failed to detect the bleeding site.Digital subtraction angiography revealed a gastric artery pseudoaneurysm and contrast extravasation from the inferior splenic artery and a branch of the left gastric artery.Successful hemostasis was achieved with embolization.CONCLUSION HCC patients who have been treated with ATZ+BVZ should be followed for 3 to 6 mo to monitor for development of massive GI bleeding.Diagnosis may require angiography.Embolization is an effective treatment.
文摘BACKGROUND Colorectal cancer(CRC)is a highly prevalent malignancy of the digestive tract worldwide,characterized by a significant morbidity and mortality rate and subtle initial symptoms.Diarrhea,local abdominal pain,and hematochezia occur with the development of cancer,while systemic symptoms such as anemia and weight loss occur in patients with advanced CRC.Without timely interventions,the disease can have fatal consequences within a short span.The current therapeutic options for colon cancer include olaparib and bevacizumab,which are widely utilized.This study intends to evaluate the clinical efficacy of olaparib combined with bevacizumab in the treatment of advanced CRC,hoping to provide insights into advanced CRC treatment.AIM To investigate the retrospective efficacy of olaparib combined with bevacizumab in the treatment of advanced CRC.METHODS A retrospective analysis was conducted on a cohort of 82 patients with advanced colon cancer who were admitted to the First Affiliated Hospital of the University of South China between January 2018 and October 2019.Among them,43 patients subjected to the classical FOLFOX chemotherapy regimen were selected as the control group,and 39 patients undergoing treatment with olaparib combined with bevacizumab were selected as the observation group.Subsequent to different treatment regimens,the short-term efficacy,time to progression(TTP),and incidence rate of adverse reactions between the two groups were compared.Changes in serum-related indicators[vascular endothelial growth factor(VEGF),matrix metalloprotein-9(MMP-9),cyclooxygenase-2(COX-2)]and tumor markers[human epididymis protein 4(HE4),carbohydrate antigen 125(CA125),carbohydrate antigen 199(CA199)]levels before and after treatment were compared between the two groups at the same time.RESULTS The objective response rate was discovered to be 82.05%,and the disease control rate was 97.44%in the observation group,which were significantly higher than the respective rates of 58.14%and 83.72%in the control group(P<0.05).The median TTP was 24 mo(95%CI:19.987-28.005)in the control group and 37 mo(95%CI:30.854-43.870)in the observation group.The TTP in the observation group was significantly better than that in the control group,and the difference held statistical significance(log-rank test value=5.009,P=0.025).Before treatment,no substantial difference was detected in serum VEGF,MMP-9,and COX-2 levels and tumor markers HE4,CA125,and CA199 levels between the two groups(P>0.05).Following treatment with different regimens,the above indicators in the two groups were remarkably promoted(P<0.05),VEGF,MMP-9,and COX-2 in the observation group were lower than those in the control group(P<0.05),and HE4,CA125,and CA199 levels were also lower than those in the control group(P<0.05).Visà-vis the control group,the total incidence of gastrointestinal reactions,thrombosis,bone marrow suppression,liver and kidney function injury,and other adverse reactions in the observation group was notably lowered,with the difference considered statistically significant(P<0.05).CONCLUSION Olaparib combined with bevacizumab in the treatment of advanced CRC demonstrates a strong clinical effect of delaying disease progression and reducing the serum levels of VEGF,MMP-9,COX-2 and tumor markers HE4,CA125 and CA199.Moreover,given its fewer adverse reactions,it can be regarded as a safe and reliable treatment option.
文摘Lung cancer is a malignant tumor with high incidence and mortality rates in China and worldwide.Approximately 10%of these diseases are caused by multiple primary non-small cell lung cancers(NSCLC).Traditional antitumor therapies,such as chemotherapy,radiotherapy,and targeted therapy,have limited efficacy in the treatment of advanced synchronous multiple primary NSCLC.Immunotherapy is considered the standard of care for advanced or recurrent NSCLC,however,approximately 60%of patients develop primary or secondary resistance to treatment.There are no standard recommendations for overcoming immune resistance.We describe a case of simultaneous multiple primary NSCLC in a patient who received programmed death factor-1(PD-1)inhibitor monotherapy and developed brain metastases.After receiving second-line treatment with a combination of another PD-1 inhibitor,pemetrexed,and bevacizumab,the patient achieved complete remission,although they experienced grade 3 immune-related adverse reactions.Immune re-challenge is safe and feasible,and choosing a synergistic combination regimen is one of the options to overcome immune resistance.A larger sample size is needed to confirm the effectiveness and safety of this strategy in patients with NSCLC resistant to prior PD-1 inhibitors.
