{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T02:47:12Z","timestamp":1792550832685,"version":"4.5.0"},"reference-count":41,"publisher":"American Medical Association (AMA)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"Importance<\/jats:title>Serum tumor markers carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA19-9), and cancer antigen 125 (CA125) have been useful in the management of gastrointestinal and gynecological cancers; however, there is limited information regarding their utility in patients with appendiceal adenocarcinoma.<\/jats:p><\/jats:sec>Objective<\/jats:title>To assess the association of serum tumor markers (CEA, CA19-9, and CA125) with clinical outcomes and pathologic and molecular features in patients with appendiceal adenocarcinoma.<\/jats:p><\/jats:sec>Design, Setting, and Participants<\/jats:title>This is a retrospective cohort study at a single tertiary care comprehensive cancer center. The median (IQR) follow-up time was 52 (21-101) months. Software was used to query the MD Anderson internal patient database to identify patients with a diagnosis of appendiceal adenocarcinoma and at least 1 tumor marker measured at MD Anderson between March 2016 and May 2023. Data were analyzed from January to December 2023.<\/jats:p><\/jats:sec>Main Outcomes and Measures<\/jats:title>Association of serum tumor markers with survival in patients with appendiceal adenocarcinoma. Cox proportional hazards regression analyses were also performed to assess associations between clinical factors (serum tumor marker levels, demographics, and patient and disease characteristics) and patient outcomes (overall survival).<\/jats:p><\/jats:sec>Results<\/jats:title>A total of 1338 patients with appendiceal adenocarcinoma were included, with a median (range) age at diagnosis of 56.5 (22.3-89.6) years. The majority of the patients had metastatic disease (1080 patients [80.7%]). CEA was elevated in 742 of the patients tested (56%), while CA19-9 and CA125 were elevated in 381 patients (34%) and 312 patients (27%), respectively. Individually, elevation of CEA, CA19-9, or CA125 were associated with worse 5-year survival; elevated vs normal was 81% vs 95% for CEA (hazard ratio [HR], 4.0; 95% CI, 2.9-5.6), 84% vs 92% for CA19-9 (HR, 2.2; 95% CI, 1.4-3.4), and 69% vs 93% for CA125 (HR, 4.6; 95% CI, 2.7-7.8) (P<\/jats:italic>\u2009&amp;lt;\u2009.001 for all). Quantitative evaluation of tumor markers was associated with outcomes. Patients with highly elevated (top 10th percentile) CEA, CA19-9, or CA125 had markedly worse survival, with 5-year survival rates of 59% for CEA (HR, 9.8; 95% CI, 5.3-18.0), 64% for CA19-9 (HR, 6.0; 95% CI, 3.0-11.7), and 57% for CA125 (HR, 7.6; 95% CI, 3.5-16.5) (P<\/jats:italic>\u2009&amp;lt;\u2009.001 for all). Although metastatic tumors had higher levels of all tumor markers, when restricting survival analysis to 1080 patients with metastatic disease, elevated CEA, CA19-9, or CA125 were all still associated worse survival (HR for CEA, 3.4; 95% CI, 2.5-4.8; P<\/jats:italic>\u2009&amp;lt;\u2009.001; HR for CA19-9, 1.8; 95% CI, 1.2-2.7; P<\/jats:italic>\u2009=\u2009.002; and HR for CA125, 3.9; 95% CI, 2.4-6.4; P<\/jats:italic>\u2009&amp;lt;\u2009.001). Interestingly, tumor grade was not associated with CEA or CA19-9 level, while CA-125 was slightly higher in high-grade tumors relative to low-grade tumors (mean value, 18.3 vs 15.0; difference, 3.3; 95% CI, 0.9-3.7; P<\/jats:italic>\u2009&amp;lt;\u2009.001). Multivariable analysis identified an incremental increase in the risk of death with an increase in the number of elevated tumor markers, with an 11-fold increased risk of death in patients with all 3 tumor markers elevated relative to those with none elevated. Somatic mutations in KRAS<\/jats:italic> and GNAS<\/jats:italic> were associated with significantly higher levels of CEA and CA19-9.<\/jats:p><\/jats:sec>Conclusions and Relevance<\/jats:title>In this retrospective study of serum tumor markers in patients with appendiceal adenocarcinoma, CEA, CA19-9, and CA125 were associated with overall survival in appendiceal adenocarcinoma. Given their value, all 3 biomarkers should be included in the initial workup of patients with a diagnosis of appendiceal adenocarcinoma.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2024.0260","type":"journal-article","created":{"date-parts":[[2024,2,28]],"date-time":"2024-02-28T16:34:33Z","timestamp":1709138073000},"page":"e240260","source":"Crossref","is-referenced-by-count":36,"title":["Serum Tumor Markers and Outcomes in Patients With Appendiceal Adenocarcinoma"],"prefix":"10.1001","volume":"7","author":[{"given":"Abdelrahman","family":"Yousef","sequence":"first","affiliation":[{"name":"Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahmoud","family":"Yousef","sequence":"additional","affiliation":[{"name":"Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, 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