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We report the 52-month follow-up of a 6-year-old girl with recurrent sialoblastoma treated with two sessions of boron neutron capture therapy (BNCT). She achieved a 23-month complete response after the first session and a sustained partial response following the second. Dosimetric analysis using a conservative \u03b1\/\u03b2 ratio of 2.0 Gy for late-responding tissues showed that the equivalent dose in 2-Gy fractions to the mandible area was approximately 4.3 Gy-Eq. This is substantially below the 15 Gy threshold recognized for skeletal impairment. Our findings suggest that BNCT is a highly selective salvage option that effectively controls refractory pediatric tumors while preserving craniofacial development.<\/jats:p>","DOI":"10.3857\/roj.2026.00108","type":"journal-article","created":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T08:34:50Z","timestamp":1782203690000},"page":"144-149","update-policy":"https:\/\/doi.org\/10.3857\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Boron neutron capture therapy for recurrent pediatric sialoblastoma: the first clinical experience and dosimetric considerations for skeletal safety with 4-year 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