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Hemangiomatous ameloblastoma; A separate entity?"

Roshna Sankar1, Sharon John1, Priya Devi1

  • 1Dept of Oral & Maxillofacial Pathology and Oral Microbiology, King George's Medical University, Lucknow, India.

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|January 25, 2025
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Summary

Hemangiomatous ameloblastoma (HA) is a rare tumor subtype. This study details a unicystic HA case with epithelial vascularity, highlighting its unique characteristics and potential pathogenesis.

Keywords:
AmeloblastomaHemangiomatous ameloblastomaUnicystic hemangiomaVascular ameloblastoma

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Area of Science:

  • Oral Pathology
  • Oncology
  • Vascular Biology

Background:

  • Ameloblastomas (AM) are locally aggressive odontogenic tumors.
  • Hemangiomatous ameloblastoma (HA) is a rare subtype with prominent vascular proliferation.
  • Vascularity in HA typically occurs in the stroma, but epithelial involvement is occasionally observed.

Purpose of the Study:

  • To report a unique case of unicystic hemangiomatous ameloblastoma with epithelial vascularity.
  • To review existing literature on HA, focusing on clinical and histopathological features.
  • To explore potential pathogenetic mechanisms for vascular proliferation within the epithelial component of HA.

Main Methods:

  • Histopathological examination of a unicystic HA case.
  • Immunohistochemical analysis, including GLUT1 staining.
  • Systematic literature review of 31 reported HA cases.

Main Results:

  • The case presented as a recurrent mandibular swelling in a 32-year-old male.
  • Histopathology revealed unicystic HA with vascularity in both stromal and epithelial components.
  • GLUT1 positivity was observed in the epithelial islands, suggesting aberrant angiogenesis or vascular mimicry.
  • Literature review confirmed male predilection and mandibular dominance in HA.

Conclusions:

  • Hemangiomatous ameloblastoma exhibits diverse vascular patterns, including rare epithelial involvement.
  • GLUT1 positivity in epithelial islands warrants further investigation into HA pathogenesis.
  • Understanding HA's unique vascular mechanisms is crucial for clinical management and future research.