Cerebrospinal fluid cytology of an endolymphatic sac tumor

Jennifer P. Bynum, Justin Bishop, Syed Z. Ali

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Endolymphatic sac tumor (ELST) is a rare neoplasm which is seldom evaluated by cytopathology. We report the clinicopathologic course and cytologic cerebrospinal fluid (CSF) findings in a 58-year-old patient with brainstem lesions who originally presented with vertigo but progressed to having left 7th, 8th, 9th, and 10th cranial nerve palsies, right-sided weakness, and occipital headaches. Cytospin of the CSF revealed large epithelioid cells similar to cells seen in a surgical resection of a brain mass three months previously. Review of the surgical specimen revealed a well-differentiated glandular and papillary neoplasm, most consistent with an endolymphatic sac tumor.

Original languageEnglish (US)
Pages (from-to)339-342
Number of pages4
JournalDiagnostic cytopathology
Issue number4
StatePublished - Apr 1 2015


  • cerebrospinal fluid
  • cytopathology
  • endolymphatic sac tumor
  • metastasis
  • middle ear

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology


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