Head and Neck

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Head and Neck
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Head and Neck
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• Neck
• Branchial cyst (Lymphoepithelial Cyst)
• at anterolateral neck ,Lined by stratified
  squamous or pseudostratified columnar
  epithelium,contain abundant lymphoid tissue
• Thyroglossal duct cyst
• Found anteriorly, midline, due to the remnants of
  thyroid developmental tract that persists ?
  producing cyst
• Paraganglioma
• Derived from neuroendocrine cells (in adrenal
  medulla called Pheochromocytomas)
• composed of nests (zellballen) of polygonal chief
  cells enclosed by trabeculae of fibrous and
  sustentacular elongated cells
• Neuroendocrine markers nonspecific enolase
  (NSE), S-100, chromogranin are positive

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Branchial cyst (Lymphoepithelial Cyst)
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Thyroglossal duct cyst
?
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Paraganglioma
zellballen