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Intraglandular botulinum neurotoxin type-A (BoNT-A) injections are considered an effective treatment to diminish drooling. However, there is no international consensus on which major salivary glands should be injected to obtain optimal treatment effect while minimizing the risk of side effects. This scoping review aimed to explore the evidence for submandibular BoNT-A injections and concurrent submandibular and parotid (i.e. four-gland) injections, respectively, and assess whether outcomes could be compared across studies to improve decision making regarding the optimal initial BoNT-A treatment approach for paediatric anterior drooling. PubMed, Embase, and Web of Science were searched to identify relevant studies (until October 1, 2023) on submandibular or four-gland BoNT-A injections for the treatment of anterior drooling in children with neurodevelopmental disabilities. Similarities and differences in treatment, patient, outcome, and follow-up characteristics were assessed. Twenty-eight papers were identified; 7 reporting on submandibular injections and 21 on four-gland injections. No major differences in treatment procedures or timing of follow-up were found. However, patient characteristics were poorly reported, there was great variety in outcome measurement, and the assessment of side effects was not clearly described. <\/jats:p><jats:p>\u00a0 <jats:italic>Conclusion<\/jats:italic>: This review highlights heterogeneity in outcome measures and patient population descriptors among studies on paediatric BoNT-A injections, limiting the ability to compare treatment effectiveness between submandibular and four-gland injections. These findings emphasize the need for more extensive and uniform reporting of patient characteristics and the implementation of a core outcome measurement set to allow for comparison of results between studies and facilitate the optimization of clinical practice guidelines.\n<jats:table-wrap><jats:table><jats:tbody>\n                    <jats:tr>\n                      <jats:td colspan=\"2\"><jats:bold>What is Known:<\/jats:bold><jats:italic>\u2022 There is no international consensus on which salivary glands to initially inject with BoNT-A to treat paediatric drooling.<\/jats:italic><\/jats:td>\n                    <\/jats:tr>\n                    <jats:tr>\n                      <jats:td colspan=\"2\"><jats:bold>What is New:<\/jats:bold><jats:italic>\u2022 Concluding on the optimal initial BoNT-A treatment based on literature is currently infeasible.\u00a0There is considerable heterogeneity in outcome measures used to quantify anterior drooling.and clinical characteristics of children treated with intraglandular BoNT-A are generally insufficiently reported.<\/jats:italic><jats:italic>\u2022 Consensus-based sets of outcome measures and patient characteristics should be developed and implemented.<\/jats:italic><\/jats:td>\n                    <\/jats:tr>\n                  <\/jats:tbody><\/jats:table><\/jats:table-wrap><\/jats:p>","DOI":"10.1007\/s00431-023-05309-1","type":"journal-article","created":{"date-parts":[[2023,11,4]],"date-time":"2023-11-04T07:02:53Z","timestamp":1699081373000},"page":"83-93","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Comparing the evidence for botulinum neurotoxin injections in paediatric anterior drooling: a scoping review"],"prefix":"10.1007","volume":"183","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0561-4768","authenticated-orcid":false,"given":"Lynn B.","family":"Orri\u00ebns","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9456-3450","authenticated-orcid":false,"given":"Karen","family":"van Hulst","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8114-0459","authenticated-orcid":false,"given":"Jan J. 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