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Background: Neuroendocrine tumors (NETs) arise from the body's diffuse endocrine system. Coexisting primary adenocarcinoma of the colon and NETs of the duodenum (D-NETs) is a rare occurrence in clinical practice. The classification and treatment criteria for D-NETs combined with a second primary cancer have not yet been determined., Case Summary: We report the details of a case involving female patient with coexisting primary adenocarcinoma of the colon and a D-NET diagnosed by imaging and surgical specimens. The tumors were treated by surgery and four courses of chemotherapy. The patient achieved a favorable clinical prognosis., Conclusion: Coexisting primary adenocarcinoma of the colon and D-NET were diagnosed by imaging, laboratory indicators, and surgical specimens. Surgical resection combined with chemotherapy was a safe, clinically effective, and cost-effective treatment., Competing Interests: Conflict-of-interest statement: The authors declare that they have no conflicts of interest to disclose., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)

Objective: To investigate the clinical value of expression level of interleukin-2 receptor (IL-2R) and interleukin-8 (IL-8) in the fever patients with hematological malignancies., Methods: A total of 121 inpatients in the First Affiliated Hospital of Anhui Medical University from April 2018 to October 2019 were enrolled in this study. The patients were separated into infection group (61 cases) and non-infection group (60 cases). In the meantime, 40 healthy people without fever or infection in the hospital for physical examination were set as matched group. C-reactive protein (CRP), procalcitonin (PCT), and cytokines were detected in all the patients with fever after admission and infection control. While, blood samples were taken from healthy people during physical examination., Results: The expression levels of IL-2R in infection group were higher than those in the control group (P<0.001), and the level of serum IL-2R in infection group was also higher than that in the non-infection group (P<0.05). Based on Spearman analysis, in patients with malignant hematologic disease, serum IL-2R level was positively correlated with CRP (r=0.557, P<0.001) and IL-8 (r=0.479, P<0.001), and IL-8 level was positively correlated with CRP (r=0.318, P<0.001). Compared with the non-infection group, the area under the curve (AUC) for the level of CRP, PCT, and IL-2R of the infection group was 0.714 (95%CI: 0.623-0.806), 0.765 (95%CI: 0.680-0.851), and 0.761 (95%CI: 0.686-0.836), the sensitivity was 0.705, 0.852, and 0.705, and the specificity was 0.717, 0.70, and 0.60, respectively. While, AUC of CRP+PCT, CRP+IL-2R, PCT+IL-2R, and CRP+PCT+IL-2R was 0.789 (95%CI: 0.712-0.866), 0.702 (95%CI: 0.623-0.782), 0.757 (95%CI: 0.677-0.838), and 0.789 (95%CI: 0.712-0.866), the sensitivity was 0.738, 0.934, 0.705, and 0.738, and the specificity was 0.840, 0.470, 0.810, and 0.840, respectively., Conclusion: CRP, PCT, IL-2R, and IL-8 are useful parameters for diagnosis of the infectious fever in patients with hematological malignancies, which provides the basis of initial diagnosis and rational use of antibioties for clinician.