J Audiol Otol.  2016 Sep;20(2):120-122. 10.7874/jao.2016.20.2.120.

Is a Solitary Fibrous Tumor in the External Auditory Canal Benign?

Affiliations
  • 1Department of Otorhinolarygology-Head and Neck Surgery, Soonchunhyang University School of Medicine, Cheonan, Korea. drqlee@hanmail.net
  • 2Department of Pathology, Soonchunhyang University School of Medicine, Cheonan, Korea.

Abstract

A solitary fibrous tumor (SFT) is an extremely rare, distinct otological soft-tissue tumor. Only two such tumors in the external auditory canal have been reported. A SFT related to hemangiopericytomas (HPC), which commonly arise in the central nervous system. HPCs act malignant in many cases, while SFTs at other sites are mainly benign. A 25-year-old female presented with highly vascular tumor at the right external auditory meatus and bleeding from the mass when a crust was removed from its surface. After excisional biopsy followed by pre-operative embolization, this tumor confirmed with SFT. The recurrence rate of SFT is very low after complete resection, with a slightly increased risk of recurrence with extrathoracic tumors. We describe the third case of SFT in the external auditory canal and review the literature.

Keyword

External auditory canal; Solitary fibrous tumor; Hemangiopericytoma
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