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The superior view of the cranium shows the frontal and paired parietal bones.
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The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
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Skull base pathology - a diagnostic conundrum.

H Devakumar1, N Cereceda-Monteoliva1, J Weir2

  • 1Department of ENT, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK.

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|December 20, 2021
PubMed
Summary
This summary is machine-generated.

This case report details a rare sinonasal myoepithelioma, a benign tumor. Diagnosis required immunohistochemistry, highlighting the importance of specialist opinion for sinonasal tumors.

Keywords:
ChondrosarcomaMyoepithelioma

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Area of Science:

  • Oncology
  • Pathology

Background:

  • Myoepithelioma is a rare benign neoplasm, typically originating in salivary glands.
  • Extra-salivary gland involvement is uncommon, with limited data on diagnostic findings.
  • This report presents the 13th documented case of sinonasal myoepithelioma.

Observation:

  • A 25-year-old male presented with chronic nasal obstruction.
  • Imaging suggested a benign sinonasal mass.
  • Initial biopsy indicated chondrosarcoma, but histopathology revealed myoepithelioma.

Findings:

  • Immunohistochemistry was crucial for accurate diagnosis of sinonasal myoepithelioma.
  • The lesion was initially misdiagnosed as chondrosarcoma or chondromyxoid fibroma.
  • The final diagnosis confirmed myoepithelioma, leading to a management plan of active monitoring.

Implications:

  • Accurate diagnosis of sinonasal tumors is critical for appropriate treatment planning.
  • Diagnostic uncertainty necessitates a broad differential diagnosis and expert consultation.
  • This case underscores the utility of immunohistochemistry in identifying rare sinonasal neoplasms.