ArticleOncology2026
Emergency Department Visits after Radiotherapy in Patients with Solid Malignancies: Analysis of Causality and Severity.
Article in Oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
introductionThis study aimed to characterize emergency department (ED) visits after radiotherapy (RT) and to assess the causality and severity of these visits.
methodsPatients who received RT for solid malignancies from 2016 to 2021 were retrospectively analyzed. The study period for ED visits was defined from the start of RT to 3 months after the completion of RT. Causes of ED visits were classified as (1) cancer treatment-related causes, (2) RT-related causes, (3) cancer-related causes, and (4) other medical conditions, and the degree of relevance for each cause was assessed as (1) certain, (2) probable, (3) possible, or (4) unlikely. Severity was graded using the Korean Triage and Acuity Scale (KTAS). Acuity at ED presentation was categorized by KTAS grade: grades 1-2 as high, grade 3 as moderate, and grades 4-5 as low. Predictors related to strong relevance (certain and probable) for each cause and to severe events were examined using binary logistic regression. A p value <0.05 indicated statistical significance.
resultsA total of 177 patients presented to the ED, and 192 ED visits were evaluated. The thoracic site was the most frequent primary site, and 67.2% of cases were stage III/IV. KTAS 3, indicating urgency, was the most common, accounting for 64.1%. The degree of relevance to RT-related causes was positively correlated with KTAS grade (r = 0.253, p < 0.001). The proportions of ED visits with strong relevance for cancer treatment-related, RT-related, cancer-related, and other medical conditions were 62.5%, 41.1%, 16.1%, and 38.0%, respectively. Among causes with strong relevance, concurrent chemoradiotherapy (OR: 4.24, p < 0.001) and curative RT (OR: 3.23, p < 0.001) were significantly associated with cancer treatment-related and RT-related causes, respectively. Severe events were more frequently observed with thoracic primary tumors (OR: 3.01, p = 0.005), intervals >30 days after RT (OR: 2.60, p = 0.016), and age ≥65 years (OR: 2.37, p = 0.022).
conclusionPatients with identified risk factors require close and continuous follow-up after RT to reduce severe ED presentations.
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