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The patient\u2019s demographic profile, the anatomical predilection of the neoplastic growth, its accelerated proliferative behaviour and distinctive morphological characteristics posed considerable diagnostic challenges. This case exemplifies the infrequent manifestation of such pathological entities in the posterior mandibular region and illuminates the complexities encountered by clinicians when confronted with lesions presenting in atypical anatomical distributions. The presentation accentuates the imperative of incorporating rare pathological entities into the differential diagnostic framework when patients manifest rapidly expanding intraoral masses demonstrating aggressive biological behaviour and clinical progression patterns.<\/jats:p>","DOI":"10.1136\/bcr-2025-270506","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T13:20:38Z","timestamp":1785158438000},"page":"e270506","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Small blue round cell tumour masquerading as dental pathology"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7941-2467","authenticated-orcid":false,"given":"Karthikeya","family":"Patil","sequence":"first","affiliation":[{"name":"Department of Oral Medicine and Radiology, JSS Dental College & Hospital, JSSAHER, Mysore, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahesh","family":"Kaggare Puttaraju","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine and Radiology, JSS Dental College & Hospital, JSSAHER, Mysore, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sharath","family":"Niranjan","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine and Radiology, JSS Dental College & Hospital, JSSAHER, Mysore, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ritu","family":"Basavarajappa","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine and Radiology, JSS Dental College & Hospital, JSSAHER, Mysore, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2026,7,27]]},"reference":[{"key":"2026072706202824000_19.7.e270506.1","doi-asserted-by":"crossref","first-page":"470","DOI":"10.5005\/jp-journals-10005-1665","article-title":"Ewing\u2019s Sarcoma of Mandible: A Case Report with Review","volume":"12","author":"Ahuja","year":"2019","journal-title":"Int J Clin Pediatr Dent"},{"key":"2026072706202824000_19.7.e270506.2","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1007\/s00428-024-03839-z","article-title":"Small blue round cell tumor with focal epithelial differentiation harboring a novel YAP1::LEUTX fusion with poor prognosis","volume":"485","author":"Yang","year":"2024","journal-title":"Virchows Arch"},{"key":"2026072706202824000_19.7.e270506.3","doi-asserted-by":"crossref","first-page":"S107","DOI":"10.4103\/jomfp.jomfp_296_21","article-title":"Ewing\u2019s sarcoma of the mandible with multilocular radiolucency","volume":"26","author":"Mishra","year":"2022","journal-title":"J Oral Maxillofac Pathol"},{"key":"2026072706202824000_19.7.e270506.4","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/s41572-018-0051-2","article-title":"Rhabdomyosarcoma","volume":"5","author":"Skapek","year":"2019","journal-title":"Nat Rev Dis Primers"},{"key":"2026072706202824000_19.7.e270506.5","doi-asserted-by":"crossref","DOI":"10.1186\/s13000-021-01183-3","article-title":"Primary desmoplastic small round cell tumor of the submandibular gland: a case report and literature review","volume":"17","author":"Zhou","year":"2022","journal-title":"Diagn Pathol"},{"key":"2026072706202824000_19.7.e270506.6","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1038\/s41572-018-0003-x","article-title":"Ewing sarcoma","volume":"4","author":"Gr\u00fcnewald","year":"2018","journal-title":"Nat Rev Dis Primers"},{"key":"2026072706202824000_19.7.e270506.7","doi-asserted-by":"crossref","first-page":"3630","DOI":"10.1039\/D4LC00005F","article-title":"Diagnostic technologies for neuroblastoma","volume":"25","author":"Khelifa","year":"2025","journal-title":"Lab Chip"},{"key":"2026072706202824000_19.7.e270506.8","doi-asserted-by":"crossref","DOI":"10.1016\/j.oooo.2024.10.205","article-title":"Aggressive embryonal rhabdomyosarcoma of the parotid-masseter region: A case report","volume":"139","author":"Garc\u00eda-Rivera","year":"2025","journal-title":"Oral Surg Oral Med Oral Pathol Oral Radiol"},{"key":"2026072706202824000_19.7.e270506.9","unstructured":"Mahmood KA , Maurantonio S , Borghesi L , et al . 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