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Surgical Treatment of an Endolymphatic Sac Tumor
Published on: May 26, 2023
Origin of endolymphatic sac tumor
1Department of Histopathology, Royal Free & UCL Medical School, University College London, University Street, London, UK. l.michaels@ucl.ac.uk
Head and Neck Pathology
|July 9, 2010
Summary
This study describes a papillary glandular neoplasm in the endolymphatic duct, confirming its origin site. Autopsy findings suggest the endolymphatic sac epithelium has potential for malignant neoplasm development.
Area of Science:
- Otolaryngology
- Pathology
- Neoplasia
Background:
- Endolymphatic sac tumors (ESTs) are rare, and their origin site is debated.
- This report details a case of a papillary glandular neoplasm in the endolymphatic duct.
Observation:
- Autopsy of temporal bone sections revealed a 1mm papillary glandular neoplasm within the left endolymphatic duct.
- The patient had no clinical or autopsy features of von Hippel Lindau disease or neurofibromatosis 2.
- Examination of normal human endolymphatic ducts and sacs (EDSs) showed hyperplastic tubular outgrowths in most cases.
Findings:
- The endolymphatic sac epithelium demonstrates potential for malignant papillary glandular neoplasm development.
- Papillary ingrowths, collagenous polypoid projections, and cysts were observed.
- Psammoma bodies were present in EDSs of older patients.
Implications:
- Accurate evaluation of EDS surgical or autopsy material is crucial to avoid misinterpreting normal features as malignant.
- This finding contributes to understanding the histogenesis of endolymphatic sac tumors.
- Further research into the neoplastic potential of EDS epithelium is warranted.
