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Acta Oto-Laryngologica Case Reports Volume 4, 2019 - Issue 1
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CASE REPORTS

Solitary fibrous tumor/hemangiopericytoma of the external auditory canal

Jefferson Rijo-CedeñoDepartment of Otorhinolaryngology-Head and Neck Surgery, Hospital UniversitarioPuerta de Hierro, Madrid, Spain; Correspondence[email protected]
ORCID Iconhttp://orcid.org/0000-0001-6313-7061
ORCID Icon,
Luz Martín-FigueiroDepartment of Pathology, Hospital UniversitarioPuerta de Hierro, Majadahonda, Madrid, Spain;
,
Harold TavárezDepartment of Pathology, Hospital UniversitarioPuerta de Hierro, Majadahonda, Madrid, Spain;
&
Rafael Ramírez-CamachoDepartment of Otorhinolaryngology-Head and Neck Surgery, Hospital UniversitarioPuerta de Hierro, Madrid, Spain; ;Faculty of Medicine, Universidad Autónoma de Madrid, Boadilla del Monte, Madrid, Spain
Pages 13-16 | Received 25 Aug 2018, Accepted 04 Dec 2018, Published online: 08 Mar 2019

Figures & data

Figure 1. Computed tomography shows a homogenous and well circumscribed soft tissue mass in the left external auditory canal (white arrows).

Figure 1. Computed tomography shows a homogenous and well circumscribed soft tissue mass in the left external auditory canal (white arrows).

Figure 2. Surgical exploration showed a well circumscribed, not encapsulated soft tissue mass of 2 × 2 × 1 cms.

Figure 2. Surgical exploration showed a well circumscribed, not encapsulated soft tissue mass of 2 × 2 × 1 cms.

Figure 3. Histological sections. (3a): Patternless pattern of hyper and hypocelullar areas separated by collagen bands (Hematoxylin and Eosin (H&E) magnification 10×); (3b): hypercelullar area with spindle-like cells (H&E magnification 20×). On immunohistochemical analysis; (3c): tumor cells were highly reactive to CD34 (magnification 10×); (3d): CD99 (magnification 20×); (3e): Bcl-2 (magnification 10×); (3f): vimentin (magnification 10×); (3g): Positive STAT6 nuclear expression (magnification 10×).

Figure 3. Histological sections. (3a): Patternless pattern of hyper and hypocelullar areas separated by collagen bands (Hematoxylin and Eosin (H&E) magnification 10×); (3b): hypercelullar area with spindle-like cells (H&E magnification 20×). On immunohistochemical analysis; (3c): tumor cells were highly reactive to CD34 (magnification 10×); (3d): CD99 (magnification 20×); (3e): Bcl-2 (magnification 10×); (3f): vimentin (magnification 10×); (3g): Positive STAT6 nuclear expression (magnification 10×).

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