title: A Solitary Fibrous Tumor of the Subglottic Larynx: Case Report and Literature Review.
abstract: BACKGROUND
  Solitary fibrous tumors (SFT) arising from the larynx are extremely rare; most occur in the supraglottic larynx.
  
  
  METHODS
  Herein, we detail a new case of a subglottic SFT presenting as a well-encapsulated soft-tissue tumor with hoarseness. It showed isoattenuation, similar to the adjacent muscle on pre-contrast computed tomography (CT) images, and strong, heterogeneous enhancement following contrast material administration, which may reflect hypervascularity. On pathological examination, it consisted of spindle cells, squeezed between abundant collagen, and focally prominent vascularity in a staghorn feature. The tumor cells were immunoreactive forCD34,BCL2andCD99. Based on the combination of architectural and immunohistochemical criteria, we ultimately diagnosed this case as an SFT.
  
  
  CONCLUSIONS
  Until now, only 14 cases of laryngeal SFT have been described in the literature: 13 located in the supraglottic areas and only one located in the subglottic/tracheal area. Therefore the present case is the second case of a subglottic SFT reported. Although rare, SFT should be included in the differential diagnosis of a well-marginated laryngeal mass with highly intense contrast enhancement, which suggests rich tumor vascularity.
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Korea.
authors.forename: Sung-Joon
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Korea.
authors.forename: Young Hen
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Korea.
authors.forename: Ki Yeol
authors.initials: KY
authors.lastname: Lee
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Korea University Ansan Hospital, Ansan, Korea.
authors.forename: Kyoung Ho
authors.initials: KH
authors.lastname: Oh
authors.affiliation: Department of Pathology, Korea University Ansan Hospital, Ansan, Korea.
authors.forename: Younghye
authors.initials: Y
authors.lastname: Kim
keywords: Larynx; benign neoplasm; solitary fibrous tumor