Peritoneum metastasis (PM) as a prognostic factor in metastatic gastric cancer (MGC) treated with anti-PD-1/PD-L1 monotherapy.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 3051-3051 ◽  
Author(s):  
Yukiya Narita ◽  
Keiji Sugiyama ◽  
Seiichiro Mitani ◽  
Kazunori Honda ◽  
Toshiki Masuishi ◽  
...  

3051 Background: Anti-PD-1 monotherapy has proven effective for the patients (pts) with MGC. However, the identification of biomarkers for predicting clinical outcomes remain as critical needs. We aimed to identify baseline characteristics associated with time to treatment failure (TTF) or overall survival (OS) for anti-PD-1/PD-L1 monotherapy as second- or later-line therapy in MGC. Methods: Routine blood count parameters and clinical characteristics at baseline were retrospectively investigated in 31 pts with MGC in Aichi Cancer Center Hospital. Endpoints were TTF and OS following anti-PD-1/PD-L1 monotherapy. Kaplan-Meiyer and Cox regression analysis were applied for survival analyses. Results: Patient characteristics were as follows: median age (range), 68 (47–83); ECOG performance status (PS) 0/1, 21/10; PM +ve/-ve, 12/19; No. of metastatic sites 1–2/≥3, 18/13; No. of prior chemotherapy regimens 1–2/≥3, 11/20; and absolute eosinophil count (AEC) <150/≥150 /μl, 14/17. Objective response rate and disease control rate (RECIST ver. 1.1) were 26% vs. 0% (odds ratio [OR], 3.76; P = 0.12) and 79% vs. 50% (OR, 3.58; P = 0.12) in the PM -ve group (Cohort A) and the PM +ve group (Cohort B), respectively. On univariate analysis, the pts with poor PS, PM +ve, and high AEC were significantly poor TTF; and poor PS and PM +ve were significantly identified as prognostic factors of poor OS. On multivariate analysis, only PM +ve was independent negative impact not only for TTF but also for OS. Median TTF and OS were 5.4 vs. 1.3 months (M) (adjusted hazard ratio [HR], 4.29; 95%CI, 1.60–11.5; P < 0.01) and 28.2 vs. 7.5 M (adjusted HR, 3.68; 95%CI, 1.25–10.8; P = 0.02) in Cohort A and Cohort B. Six-months TTF probabilities of 42% vs. 0% ( P = 0.03) and one-year OS probabilities of 58% vs. 8% ( P< 0.01) were observed in Cohort A compared to in Cohort B. Conclusions: PM -ve in the pts treated with anti-PD-1/PD-L1 monotherapy was associated with better efficacy. In the pts with PM -ve, anti-PD-1/PD-L1 monotherapy could be adapted in first-line therapy. [Table: see text]

2011 ◽  
Vol 29 (4_suppl) ◽  
pp. 427-427
Author(s):  
S. Matsusaka ◽  
N. Mizunuma ◽  
M. Suenaga ◽  
K. Chin ◽  
E. Shinozaki ◽  
...  

427 Background: The purpose of this study was to identify CEC threshold proposal for determining response to FOLFOX4 plus bevacizumab in metastatic colorectal cancer (mCRC). Methods: All patients were enrolled using institutional review board-approved protocols at the Cancer Institute Hospital and provided informed consent. From July 2007 to June 2008, 33 patients treated with FOLFOX4 plus bevacizumab were enrolled in a prospective study. From January 2007 to June 2007, before bevacizumab was approved by the government in Japan, 31 patients treated with FOLFOX4 as a control were enrolled. The study population consisted of patients aged 18 years or older with histologically proven mCRC. Other inclusion criteria were Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1, adequate organ function. CECs of whole blood at the baseline, day 4, 2 weeks after initiation of chemotherapy were isolated and counted using immunomagnetics. Results: There was no correlation between CEC levels and the outcome in the FOLFOX4. In the FOLFOX4 plus bevacizumab, CEC levels at the baseline were significantly associated with the outcome. Patients with 65 or more CECs at the baseline had shorter median PFS (9.2 months), than the median PFS of fewer than 65 CECs at the baseline (18.9 months) in the FOLFOX4 plus bevacizumab (p = 0.003). Patients with 65 or more CECs at the baseline had shorter median OS (23.3 months), than the median OS of fewer than 65 CEC s at the baseline in the FOLFOX4 plus bevacizumab (p = 0.027). In the univariate analysis, lung metastasis, lymph node metastasis, and CEC levels at the baseline predicted PFS. In the univariate Cox regression analyses, peritoneal metastasis, CEC levels at the baseline were associated with OS. In order to evaluate the independent predictive effect of FOLFOX4 plus bevacizumab, multivariate Cox regression analysis was carried out. CEC levels at the baseline were the strongest predictor. Conclusions: A threshold of lower than 65 CEC/4mL at the baseline was a significant predictor of the outcome for colorectal cancer patients treated with FOLFOX4 plus bevacizumab. No significant financial relationships to disclose.


2014 ◽  
Vol 32 (4_suppl) ◽  
pp. 446-446
Author(s):  
Avishay Sella ◽  
M. Dror Michaelson ◽  
Ewa M. Matczak ◽  
Ronit Simantov ◽  
Mariajose Lechuga ◽  
...  

446 Background: The Memorial Sloan Kettering Cancer Center risk model (MSKCC) stratifies pts with mRCC into 3 prognostic groups based on 5 risk factors. The Intermediate Prognosis (INTMP) risk group is characterized by the presence of 1 or 2 factors, equivalent to 15 possible distinct entities. This heterogeneity suggests that the efficacy of tyrosine kinase inhibitors may be less predictable in the INTMP than in the other groups. Methods: We identified 548 patients with INTMP mRCC from a pooled analysis of patients treated with sunitinib in 6 prospective phase II and III clinical trials. Statistical analysis was performed using Cox regression and Kaplan-Meier methods and Pearson chi-square tests. Results: Most INTMP pts were male (69%), with clear cell carcinoma (93%), good ECOG performance status (PS) (60.5% PS 0; 38% PS 1; 1.5% PS 2) and median age 60. There were 325 pts (56%) with 1risk factor, and the most common were <1 year from diagnosis (38%); low hemoglobin (Hg) (29%), or both (16%). Objective response rate (RR) was 35.4%, progression free survival (PFS) was 8.4 months (m) and overall survival (OS) was 20.5 m. The 325 (59.3%) pts with one risk factor fared better than the 223 (40.7%) patients with two: PFS 10.7 vs 6.5 m, HR 0.684(95% CI 0.563-0.832, p<0.001); OS 26.3 vs 14.1 m, HR 0.522 (95% CI 0.420-0.648, p<0.001). RR was similar (38.5% vs 30.9%, p=0.071). Sunitinib was more effective in pts with PS 0: PFS 9.7 vs 7.8 m, HR 0.797 (95% CI 0.654-0.972, p=0.0242); OS 24.7 vs 14.0 m, HR 0.529 (95% CI 0.426-0.657, p<0.001), RR 38.9% vs 30.1%, (p=0.036). The most common grade 3/4 adverse events (AE) were fatigue (17%), hypertension (10%), hand foot skin reaction (9%), and nausea (4%). Overall, 17% of patients discontinued due to AE, and the overall pattern of AEs did not vary among the subgroups. Conclusions: MSKCC INTMP is a heterogeneous group comprised mostly of pts with low Hg and/or < 1 year from diagnosis. PFS and OS are superior in pts with 1 vs. 2 risk factors, and PS is also an important factor in the INTMP group. Sunitinib is active and well-tolerated in INTMP pts. Clinical trial information: NCT00077974, NCT00083889, NCT00137423, NCT00267748, NCT00338884, NCT00054886.


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. e16122-e16122 ◽  
Author(s):  
F. Scotte ◽  
E. Banu ◽  
J. Medioni ◽  
M. Boudraoui ◽  
J. M. Tourani ◽  
...  

e16122 Background: Docetaxel is the standard first-line treatment for patients (pts) with metastatic HRPC. Taxanes are a well known cause of nail toxicity but docetaxel-related nail toxicity is rarely explored. Methods: Eligible HRPC pts included in the current analysis were from a phase II, multicentre, case-control study (Scotte F et al, J Clin Oncol 2005). Pts were treated with docetaxel 75 mg/m2 every 3 weeks and oral prednisone 10 mg daily. Nail toxicity was graded according to NCI CTC version 2 (0: absence of toxicity; 1: minor changes; 2: onycholisis). The endpoint of interest was the impact of nail toxicity on overall survival (OS) using Cox regression analysis as the main statistical method. OS was the time from the start of chemotherapy to death or last follow-up. Results: Data from 23 HRPC pts treated in two French centres were analyzed. The median age was 68 years, 91% of pts had bone metastases, 84% had a single metastatic site, 49% had a Gleason score of ≥ 8 and 91% had an ECOG performance status (PS) of 0 or 1. Median OS was 16.7 months [95% confidence interval (CI), 5.7–27.6 months], all pts died. There were differences in OS between nail toxicity categories (see Table). Median OS was 10.6 months (95% CI, 9.5–11.7) and 22.7 months (95% CI, 15.1–30.3) for pts without and with nail changes, respectively. Nail changes severity was significantly related to OS: hazard ratio (HR)=0.50 (95% CI, 0.28–0.92), P=0.027 (univariate analysis). The multivariate analysis adjusted by ECOG PS (the second covariate associated with prognosis) showed a 63% reduction in the risk of death for pts with nail toxicities: HR=0.29 (95% CI, 0.09–0.82), P=0.049. Conclusions: Our results suggest that pts with docetaxel-related nail toxicity have a better OS than those with no nail toxicity. This demonstrates that nail changes in HRPC pts treated with docetaxel are predictive of OS; these findings should be validated in a large cohort of pts. [Table: see text] No significant financial relationships to disclose.


Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 4371-4371 ◽  
Author(s):  
Jakob Hammersen ◽  
Michael Sommer ◽  
Christin Gössel ◽  
Ulf Teichgräber ◽  
Sabine Hahnfeld ◽  
...  

Abstract Introduction Frail patients with aggressive NHL frequently do not qualify for CHOP-based chemotherapy. Alternatives are required urgently. Bendamustine has been well established as a standard treatment of indolent lymphomas. Its use in high grade lymphoma has been suggested as a promising option. However, which patients benefit most effectively requires further clarification. Methods We retrospectively characterized 51 unselected consecutive patients (39,2% female, 60,8% male, median age 70 years, range 32 - 92 years) with aggressive NHL treated with bendamustine +/- rituximab. They were analyzed for baseline characteristics (histological type, IPI, ABC/GCB-subtypes, age, ECOG, comorbidity (CIRS-G), outcome (ORR, PFS, OS), and toxicity (CTCAE)). Results 21 patients with aggressive NHL received Bendamustin as 1st-line therapy and 30 patients beyond 1st-line. Of the 1st line patients 14 suffered from diffuse large cell B cell lymphoma (DLCBL), 5 from mantle cell lymphoma (MCL), and 2 from other subtypes. In 1st line patients median age was 82 years, ECOG-status was ≥ 2 in 38%. Median international prognostic index (IPI) was 3 (range 1-4). Comorbidity assessment by CIRS-G revealed median 3 (range 1 to 5) severely or very severely affected organs. The overall response rate (ORR) in 1st line treatment was 91%, with a median progression free survival (PFS) of 6 months and a median overall survival (OS) of 15 month. In DLBCL 5 GCB- and 6 ABC-lymphomas were differentiated. GCB-patients showed an ORR of 80% (2 complete remission (CR), 2 partial remission PR)), a median PFS 8 month and OS of 15 months, respectively. ABC-patients had an ORR 67% (no CR, 4 PR, 2 SD), a median PFS of 6 month and OS of 8 months, respectively (n.s.). 7 patients achieved a long term-remission >5 years. Univariate analysis of prognostic variables showed significance for ECOG (p<0.0001) and CIRS-G (p=0.002) for OS, Cox-regression analysis showed significance for ECOG (p=0.016). No significance was shown for disease stage or LDH activities. The ORR in patients beyond 1st-line therapy (median age 64 years, ECOG-status ≥ 2 in 17%) was 66% with a median PFS of 8 month and OS of 24 month. Median cumulative dose was 540 mg/m2 in median 4 cycles. Toxicity in the 1st-line cohort was moderate, mainly grade 1 & 2. Three patients showed grade 3 leukocytopenia. Other side effects primarily were: inappetence, weight-loss, fever. Conclusion Bendamustine shows high efficacy in aggressive NHL, even sustained remission was achieved by a subgroup, which requires further definition. Toxicity was well manageable. Defining prognostic parameters we showed GCB-subtype of DLBCL might predict a better outcome in bendamustine treated patients. Remarkably, performance and comorbidity assessment is of crucial prognostic value with a greater impact on outcome compared to classic parameters. Currently, the BRENDA trial (NCT01686321) prospectively investigates the role of bendamustine in aggressive NHL. Disclosures: Off Label Use: Use of Bendamustine in aggressive NHL. Wedding:Roche: Speakers Bureau; Amgen: Speakers Bureau; Chugai: Speakers Bureau; Janssen-Cilag: Speakers Bureau; Novartis: Speakers Bureau; Cephalon: Speakers Bureau; Prostarkan: Speakers Bureau; Pfizer: Speakers Bureau. La Rosée:Mundi Pharma: Honoraria.


2013 ◽  
Vol 31 (31_suppl) ◽  
pp. 39-39
Author(s):  
Safiya Karim ◽  
Shahid Ahmed

39 Background: Recent evidence has shown that patients with stage IV NSCLC benefit from early referral to palliative care (PC). In August 2010, a landmark randomized control trial revealed that patients with advanced NSCLC, who received early PC, had better quality of life, mood and survival (NEJM 2010; 363:733-42). Our study aimed to determine pattern of PC referral in clinical practice, in patients with stage IV NSCLC before and after the publication of the trial, and to assess factors correlated with PC referral. Methods: The study population was comprised of a cohort of patients with stage IV NSCLC, diagnosed between 2009 and 2011, and referred to the Saskatoon Cancer Center. Logistic regression models were used to assess factors correlated with PC referral. Kaplan Meier method was used to estimate survival. Cox regression analyses were used to determine factors correlated with survival. Results: 215 patients with median age of 68 yrs (range: 40-92) and M:F of 108:107 were identified. 101 (47%) patients had comorbid illness, 100 (47%) had ECOG performance status <2, 136 (63%) were married/common law and 161 (75%) had symptomatic disease. 126/251 (58%) were referred to PC. 70/118 (59%) diagnosed before Sep 2010 were referred to PC compared with 56/97 (58%) diagnosed after Sep 2010 (p=NS). The median time to PC referral from date of diagnosis was 51 days (inter-quartile range: 19-155). 33% patients were referred within 4 wks of diagnosis. Symptomatic disease (odd ratio [OR]=3.7, 95% CI =1.8-7.5), bone metastasis (OR = 3.0, 95% CI = 1.6-5.6), and brain metastasis (OR=2.2, 95% CI =1.1-4.5) were correlated with referral to PC. Median survival of whole cohort was 4 months (95% CI: 3.1-4.8). 2nd or 3rd line therapy (Hazard ratio [HR]= 0.54, 95% CI:0.34-0.87), non-smoking status (HR= 0.58, 95% CI:0.38-0.87), chemotherapy (HR 0.64, 95% CI:0.46-0.89), and lack of symptoms (HR=0.68, 95%CI:0.48-0.96) were correlated with better survival. Conclusions: Our study shows that publication of the landmark trial did not influence the pattern of referral to PC at our center. Symptomatic patients and those with metastasis to brain or bone were more often referred to PC. No survival benefit was seen in patients who were referred to PC.


2011 ◽  
Vol 29 (4_suppl) ◽  
pp. 43-43
Author(s):  
S. Matsusaka ◽  
K. Chin ◽  
N. Mizunuma ◽  
M. Ogura ◽  
M. Suenaga ◽  
...  

43 Background: The purpose of this study was to quantify circulating tumor cells (CTCs) in advanced gastric cancer (AGC) patients, and to demonstrate the role of CTCs in cancer therapy. The purpose of this study was to identify CTC threshold proposal for determining response to chemotherapy in AGC. Methods: From November 2007 to June 2009, fifty-two patients with AGC were enrolled into a prospective study. All patients were enrolled using institutional review board-approved protocols at the Cancer Institute Hospital and provided informed consent. The study population consisted of patients of aged 18 years or older with histologically proven AGC. Other inclusion criteria were Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 2; adequate organ function. The subjects were five patients treated with S-1 (40 mg/m2, twice daily, days 1-28, repeated every 6 weeks), twenty-six patients treated with S-1 plus CDDP (S-1 40 mg/m2, twice daily, days 1-21, CDDP 60 mg/m2, day 8, repeated every 5 weeks), and twenty-one patients treated with paclitaxel (80 mg/m2, weekly). CTCs of whole blood at baseline, two weeks and four weeks after initiation of chemotherapy, were isolated and enumerated using immunomagnetics. Results: Patients with ≥4 CTCs at two-week points and four-week points had a shorter median PFS (1.4, 1.4 months, respectively), than those with the median PFS of <4 CTCs (4.9, 5.0 months, respectively) (p<0.001, p<0.001, respectively). Patients with ≥4 CTCs at two-week points and four-week points had shorter median OS (3.5, 4.0 months, respectively) than those with the median PFS of <4 CTCs (11.7, 11.4 months, respectively) (p<0.001, p=0.001, respectively). In univariate analysis, PS, treatment regimen, Line of chemotherapy, and CTC levels at 2 weeks and 4 weeks predicted PFS and OS. In order to evaluate the independent predictive effect of chemotherapy, multivariate Cox regression analysis was carried out. CTC levels at 2 weeks and 4 weeks were the strongest predictors. Conclusions: A threshold of lower than 4 CTC/7.5 ml at 2 weeks and 4 weeks was a significant predictor of the outcome for AGC patients treated with S-1 based regimen or paclitaxel regimen. No significant financial relationships to disclose.


2014 ◽  
Vol 32 (4_suppl) ◽  
pp. 322-322 ◽  
Author(s):  
David J. Benjamin ◽  
Richard M. Bambury ◽  
Joshua Chaim ◽  
Emily C. Zabor ◽  
Irina Ostrovnaya ◽  
...  

322 Background: No standard therapy exists for platinum refractory mUC. Single agent pemetrexed (Pmt) had objective response rates (ORR) of 8% and 28% in two phase II studies (enrolling 13 and 47 patients) and is commonly used in this setting. To address the difference in reported ORRs, we performed a retrospective analysis of Pmt use at MSKCC to evaluate objective response in a larger cohort of patients. A secondary aim was to explore whether neutrophil-lymphocyte ratio (NLR) added prognostic value beyond known factors (time from prior chemotherapy (TFPC), ECOG performance status (PS), liver metastases, and hemoglobin) in the UC salvage setting. Methods: Patients who received Pmt for platinum refractory mUC between 2008 and 2013 were identified. Baseline demographics, clinical characteristics, prior therapies, Pmt dose, and number of cycles were recorded. ORR was determined according to RECIST 1.1. Kaplan-Meier method and Cox regression were used to analyze associations with overall survival (OS). Results: 135 patients were identified with median age 66 (range 45-88), male 76%, ECOG 0 in 14% / 1 in 54% / ≥2 in 32%. Pmt was administered as 2nd-line chemotherapy in 56% / 3rd line in 30% / ≥4th line in 14%. ORR was 7% with median duration of response 10.2 months. There was no significant difference in ORR by line of therapy or PS. Median progression free survival was 2.4 months and median OS was 6.6 months. In this dataset, TFPC was not prognostic, while liver metastases, PS, and hemoglobin were prognostic. Higher NLR was significantly associated with worse OS independent of other known factors. Conclusions: In the largest reported series to date, Pmt had an ORR of 7% in metastatic UC regardless of line of therapy or ECOG performance status. This limited activity highlights the urgent need to develop novel therapeutic strategies. NLR was identified as an independent prognostic factor in this setting. [Table: see text]


2016 ◽  
Vol 34 (4_suppl) ◽  
pp. 416-416
Author(s):  
Humaid Obaid Al-Shamsi ◽  
Reham Abdel-Wahab ◽  
Manal Hassan ◽  
Gehan Botrus ◽  
Ahmed S Shalaby ◽  
...  

416 Background: Prognostic modeling of hepatocellular carcinoma (HCC) is complex due to preexisting cirrhosis in most cases. Tumor features and factors related to functional hepatic reserve must be taken into account when considering treatment options or counseling patients about their survival. The key prognostic factors may vary at different stages of the disease especially for early stage. Methods: From 1992 to 2011 total of 397 HCC patients with T1N0M0 were referred to MD Anderson Cancer Center for treatment. Detailed clinical-pathologic information were retrieved from medical records. Univariate analysis was done using the c2or Fisher’s exact test for categorical variables. Kaplan-Meier used to estimate the median overall survival (OS). Multivariate cox regression analysis was performed to estimate the hazard ratio (HR) and 95% confidence interval (CI). Results: The male to female ratio was3:1. The mean age ± standard deviation was 65.04 ± 12.5, 57.2% were non-viral related, 59.7% had cirrhosis, and 9.3% had poorly differentiated tumor (PDT). Median OS (95% CI) was 28.5 months (23.6 – 33.4). First line therapy is summarized in table 1. Surgical intervention was similar to systemic therapy with 76% reduction in mortality compared to non-treated group. Restricted analysis among cirrhotic patients showed similar results. PDT was associated with significant poor prognosis compared to well-differentiated tumor, HR (95% CI) was 2.42 (1.36-4.28) after adjustment for demographic, epidemiological, and clinical factors. Conclusions: Our results indicate that T1N0M0 HCC patients have similar outcome with systemic therapy and surgery which could be beneficial for patients with underlying cirrhosis and high risk of postsurgical complications. [Table: see text]


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 1571-1571
Author(s):  
Hyo Song Kim ◽  
Ting Wu ◽  
Hyunki Kim ◽  
Hyun Cheol Chung ◽  
Jaffer A. Ajani ◽  
...  

1571 Background: Data are limited and conflicting regarding programmed death ligand 1 (PD-L1) expression as prognostic of clinical outcomes in patients (pts) with metastatic gastric cancer (mGC) treated with standard of care (SOC). Factors affecting the association between PD-L1 expression and outcomes include type of assay and antibody, scoring system for PD-L1 expression, and method of tissue collection. We analyzed the association between tumor PD-L1 expression and clinical parameters in Korean pts with inoperable mGC. Methods: A retrospective study was performed in 201 pts with inoperable mGC from Yonsei Cancer Center in Seoul, South Korea. Biopsy samples were collected at diagnosis. Tumor PD-L1 expression was measured by IHC using the 22C3 PD-L1 antibody pharmDx kit (Dako North America, Carpinteria, CA, USA). PD-L1 positivity was defined as a combined positive score (CPS) of ≥1%, where CPS is PD-L1+ cells (tumor cells, macrophages, lymphocytes) over the total number of tumor cells, expressed as a percentage. Survival was analyzed using Kaplan-Meier methods, log-rank test, and Cox proportional hazards models, adjusting for age, sex, and ECOG performance status. Results: A total of 189/201 (94%) pts received chemotherapy as SOC and were included in this analysis. Median age was 56 years (range, 21-82), 37% of pts were women, and 28% had a BMI ≥24. All pts had stage IV metastatic disease and 27%, 49%, and 24% had well to moderately differentiated, poorly differentiated, and signet ring cell tumors, respectively. Prevalence of PD-L1 positivity was 72.5%. PD-L1 positivity was not associated with age, BMI, or histologic grade. Median overall survival (OS) for the PD-L1+ and PD-L1– groups was 10.9 and 10.2 months, respectively ( P= 0.92). The hazard ratio for the PD-L1+ vs the PD-L1–group was 1.02 (95% CI, 0.74-1.39) before adjusting for age, sex, and ECOG performance status and 1.08 (95% CI, 0.77-1.51) after adjusting. Conclusions: Based on this preliminary assay and cutoff, results suggest that PD-L1 expression is not a prognostic factor for mGC. Additional biomarker analyses (eg, immune gene expression profile and microsatellite instability) are planned.


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. e15131-e15131 ◽  
Author(s):  
Camilla Stedstrup Mosgaard ◽  
Mathias Holsey Gramkow ◽  
Christian Dehlendorff ◽  
Dorte Nielsen ◽  
Per Pfeiffer ◽  
...  

e15131 Background: CEA is regarded as the marker of choice for monitoring patients with colorectal cancer (CRC), but the value of using CA19-9 is insufficient. The prognostic value of serum CA19-9 in combination with CEA was evaluated in patients with metastatic CRC (mCRC) before first (1) and third line therapy (3LT). Methods: From April 2004 to May 2015, pretreatment serum samples were collected from 160 and 255 patients with mCRC before 1LT and 3LT, respectively. Median age was 64 [range 33-87] and male/female ratio 243(59%)/172(41%). Serum CA19-9 was determined by routine chemiluminescent immunometric assay (normal range 0-37 KU/l). Progression-free survival (PFS) and overall (OS) crude, adjusted hazard ratios (HR) and corresponding 95% confidence intervals (CIs) were estimated using Cox regression analysis. CA19-9 and CEA were included as log2-transformed continuous variables and adjustment included mutually between CA19-9 and CEA in addition to primary tumor location, sex and age. Results: In 3LT median pretreatment CEA levels were higher than in 1LT (59 µg/l [IQR 14-288] vs. 23[6-153] P < 0.01) while CA19-9 values were similar (112 KU/l [23-626] vs. 98[19-390]). In patients treated with 3LT univariate analysis showed that high levels of CA19-9 and CEA were associated with short PFS (CA19-9: HR = 1.06, 95% CI 1.02-1.10, P < 0.01; CEA: HR = 1.05, 1.00-1.09, P = 0.04). In 1LT neither CA19-9 nor CEA were significantly associated with PFS. In a multivariate analysis, none of the biomarkers were significantly associated with PFS. In patients treated with 3LT univariate analysis showed that high levels of CA 19-9 and CEA were associated with short OS (CA19-9: HR = 1.11, 1.07-1.16, P < 0.01; CEA: HR = 1.1, 1.06-1.16, P < 0.01). In patients treated with 1LT high levels of CA-19-9 but not CEA was significantly associated with a shorter OS (HR = 1.07, 1.00-1.14, P = 0.04). In 3LT multivariate analyses showed that high levels of CA19-9 and CEA were the only factors associated with a shorter OS (CA19-9: HR = 1.08, 1.03-1.13, P < 0.01; CEA: HR = 1.07, 1.01-1.14, P < 0.01), while there was no significant association to OS in 1LT. Conclusions: Serum CA19-9 may be a valuable prognostic biomarker in combination with CEA in mCRC patients receiving third line therapy.


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