Is a Solitary Fibrous Tumor in the External Auditory Canal Benign?
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.
Department of Otorhinolarygology-Head and Neck Surgery, Soonchunhyang University School of Medicine, Cheonan, Korea.
Chi-Kyou
CK
Lee
Department of Pathology, Soonchunhyang University School of Medicine, Cheonan, Korea.
Hyun Ju
HJ
Lee
External auditory canal; Hemangiopericytoma; Solitary fibrous tumor