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CD34 expressing ameloblastic fibrosarcoma arising in the maxilla: a new finding
Ok-Jun Lee1, Hyun Jung Kim, Bu Kyu Lee
1Department of Pathology, Chunbuk National University Hospital, Cheongju, Korea.
Summary
Ameloblastic fibrosarcoma (AFS), a rare jaw tumor, typically has fibroblast-like cells. This case reveals CD34 expression in the mesenchymal component, a novel finding for this maxillary malignancy.
Area of Science:
- Oral pathology
- Surgical oncology
- Tumor immunology
Background:
- Ameloblastic fibrosarcoma (AFS) is a rare malignant odontogenic tumor.
- The immunophenotype of the mesenchymal component in AFS is poorly understood, with only vimentin expression commonly noted.
- Previous studies describe the mesenchymal cells as 'fibroblast-like'.
Observation:
- A case of ameloblastic fibrosarcoma in a 62-year-old female patient is presented.
- The mesenchymal component of the tumor exhibited features consistent with dermatofibrosarcoma protuberans or fibrosarcoma.
- Immunohistochemical analysis revealed positivity for CD34 in the mesenchymal component.
Findings:
- This study reports the first case of CD34-positive ameloblastic fibrosarcoma.
- The CD34 expression in the mesenchymal component of AFS is a significant finding.
- The tumor was located in the maxilla.
Implications:
- The CD34 positivity may aid in the differential diagnosis of ameloblastic fibrosarcoma.
- Further research is needed to understand the prognostic and therapeutic significance of CD34 expression in AFS.
- This finding expands the known immunophenotypic profile of ameloblastic fibrosarcoma.