{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,26]],"date-time":"2025-08-26T11:40:11Z","timestamp":1756208411419,"version":"3.44.0"},"reference-count":47,"publisher":"Wiley","issue":"16","license":[{"start":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T00:00:00Z","timestamp":1755734400000},"content-version":"vor","delay-in-days":20,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cancer Medicine"],"published-print":{"date-parts":[[2025,8]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>The COVID\u201019 pandemic reintroduced single\u2010fraction radiotherapy for symptomatic bone metastases due to its efficiency, rapid realization, and cost\u2010effectiveness. However, pain flare can occur as a side effect that can have a significant impact on a patient's quality of life. With pain flare incidence ranging between 2% and 44%, there are no definitive conclusions about which patients are at greater risk.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aim<\/jats:title><jats:p>This study aims to analyze the occurrence of pain flare in relation to age, patient's performance status, primary tumor, histopathology, and bone localization of metastases.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Our clinical, prospective, non\u2010randomized study included 64 patients with non\u2010complicated, painful bone metastases who underwent palliative, pain\u2010relieving 8\u2009Gy single\u2010fraction radiotherapy in a single hospital visit. Response to treatment was patient\u2010reported via telephone interview using a visual analog scale and assessed based on the international consensus panel of radiation oncologists.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In the entire group of patients, 17% developed pain flare. No statistically significant difference was observed in pain flare occurrence depending on the patient's age, performance status, the primary origin of the tumor, histopathology, or location of the metastasis (bone) that was irradiated. All but one patient had a good response to treatment after the flare.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Pain flare can be expected in less than 20% of patients receiving 8\u2009Gy single fraction radiotherapy for painful bone metastases. It is not proven that any of the mentioned clinical parameters influence the occurrence of pain flare. Pain flare does not interfere with response to treatment.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cam4.71175","type":"journal-article","created":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T08:53:41Z","timestamp":1755766421000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Pain Flare After Single Fraction Radiotherapy for Symptomatic Bone Metastases\u2014Do We Have a Predictive Model?"],"prefix":"10.1002","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7531-7948","authenticated-orcid":false,"given":"Tatjana","family":"Arsenijevi\u0107","sequence":"first","affiliation":[{"name":"Faculty of Medicine University of Belgrade  Belgrade Serbia"},{"name":"Institute for Oncology and Radiology of Serbia  Belgrade Serbia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aleksandar","family":"Stepanovi\u0107","sequence":"additional","affiliation":[{"name":"Faculty of Medicine University of Belgrade  Belgrade Serbia"},{"name":"Institute for Oncology and Radiology of Serbia  Belgrade Serbia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Snje\u017eana","family":"Bogi\u0107evi\u0107","sequence":"additional","affiliation":[{"name":"Institute for Oncology and Radiology of Serbia  Belgrade Serbia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dragica","family":"Gr\u017eeti\u0107","sequence":"additional","affiliation":[{"name":"Institute for Oncology and Radiology of Serbia  Belgrade Serbia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marina","family":"Nikitovi\u0107","sequence":"additional","affiliation":[{"name":"Faculty of Medicine University of Belgrade  Belgrade Serbia"},{"name":"Institute for Oncology and Radiology of Serbia  Belgrade Serbia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,8,21]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1200\/JCO.1991.9.3.509"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pain.2013.07.044"},{"issue":"3","key":"e_1_2_12_4_1","first-page":"293","article-title":"Bone Cancer Pain and the Role of RANKL\/OPG","volume":"4","author":"Clohisy D. 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