Open AccessEpithelioid Sarcoma of the External Auditory Canal: An Uncommon Tumor at an Unusual Site and a Brief Overview of the Literature
Author(s) -
Bingcheng Wu,
J. S. H. Tay,
Woei Shyang Loh,
Fredrik Petersson
Publication year - 2021
Publication title -
head and neck pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 50
eISSN - 1936-0568
pISSN - 1936-055X
DOI - 10.1007/s12105-020-01275-4
Subject(s) - epithelioid sarcoma , auditory canal , cd34 , immunohistochemistry , pathology , sarcoma , medicine , anatomy , biology , genetics , stem cell
We present a case (41 years old pregnant female) with epithelioid sarcoma arising in the left external auditory canal. On immunohistochemistry, the tumor cell diffusely expressed cytokeratins and showed patchy expression of ERG and CD34. The neoplastic cells demonstrated uniform loss of INI1-expression. Epithelioid sarcoma arising in the external auditory canal is rare. Awareness that ES may rarely arise at unusual sites is of critical importance in order to apply a broad enough panel in the immunohistochemical study, so a misdiagnosis of carcinoma can be avoided.