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Cunha JLS, Cavalcante IL, Barros EF, de Sousa Neto SS, Cavalcante RB, Turatti E, de Mendonça EF, de Albuquerque-Júnior RLC, Anbinder AL, Fragata da Silva D, Duarte IX, Nonaka CFW, Alves PM, de Almeida OP, de Andrade BAB. Oral solitary fibrous tumors: A collaborative clinicopathologic study of 19 cases. Oral Dis 2023. [PMID: 37731190 DOI: 10.1111/odi.14737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 07/31/2023] [Accepted: 08/29/2023] [Indexed: 09/22/2023]
Abstract
OBJECTIVE To report the clinicopathologic features of 19 oral solitary fibrous tumors (SFTs). METHODS Clinical data were collected from the records of seven pathology services. All cases were re-evaluated by HE staining and confirmed by immunohistochemistry. RESULTS The series comprised 11 females (57.9%) and 8 males (42.1%), with a mean age of 47.3 ± 14.7 years (range: 22-71 years) and a 1.3:1 female-to-male ratio. Most tumors affected the buccal mucosa (n = 7; 36.8%) and presented clinically as an asymptomatic solitary submucosal well-circumscribed nodule with coloration similar to the oral mucosa. Morphologically, most SFTs (n = 10; 52.6%) exhibited a classic hybrid pattern characterized by a well-circumscribed proliferation of densely cellular areas alternating with hypocellular areas in a variably collagenous vascular stroma. Remnants of accessory salivary glands were observed in two cases (n = 2; 10.5%). All tumors were positive for STAT6 and CD34 (n = 19; 100%). Outcome information was available from 6 patients (31.6%), with clinical follow-up ranging from 6 to 24 months (mean ± SD, 9.5 ± 6.8 months), and none developed local recurrence. CONCLUSIONS Oral SFTs are rare and often clinically misdiagnosed. Pathologists should consider SFT in the differential diagnosis of oral spindle cell tumors. Accurate diagnosis requires careful morphological evaluation supported by immunohistochemical analysis.
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Affiliation(s)
- John Lennon Silva Cunha
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
- Department of Dentistry, State University of Paraíba (UEPB), Campina Grande, Brazil
| | - Israel Leal Cavalcante
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- School of Dentistry, University of Fortaleza (UNIFOR), Fortaleza, Brazil
| | | | - Sebastião Silvério de Sousa Neto
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
- Department of Dentistry, Federal University of Goiás (UFG), Goiânia, Brazil
| | | | - Eveline Turatti
- School of Dentistry, University of Fortaleza (UNIFOR), Fortaleza, Brazil
| | | | | | - Ana Lia Anbinder
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | | | | | | | | | - Oslei Paes de Almeida
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
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