title: A rare presentation of retiform hemangioendothelioma in the external auditory canal.
abstract: Retiform hemangioendothelioma is a rare intermediate or borderline neoplasm of the blood vessels that mostly occurs in extremities. Here we report a unique case of retiform hemangioendothelioma presented in the external auditory canal. 58-year-old male patient presented with the complaint of right ear swelling for 4 years. On examination, a spherical swelling in the right ear was found occluding the view of external auditory canal. The tumor was removed surgically. Intraoperatively, the mass was found attached to the outer part of the right external auditory canal near the root of helix. Histopathology of the resected tumor showed typical features of retiform hemangioendothelioma. In addition, immunohistochemical analysis revealed that tumor was positive for endothelial cell marker CD34 and occasionally positive for cell proliferative marker Ki-67.
authors.affiliation: Department of Otorhinolaryngology, Government Thiruvarur Medical College Hospital, Thiruvarur, Tamil Nadu 610004, India.
authors.forename: Ezhil Arasan
authors.identifier: 0000-0001-5792-8967
authors.initials: EA
authors.lastname: Jothi
authors.affiliation: Department of Otorhinolaryngology, Government Thiruvarur Medical College Hospital, Thiruvarur, Tamil Nadu 610004, India.
authors.forename: Muthuchitra
authors.initials: M
authors.lastname: Sundaram
authors.affiliation: Department of Pathology, Government Thiruvarur Medical College Hospital, Thiruvarur, Tamil Nadu 610004, India ; Department of Pathology, Government Villupuram Medical College, Villupuram, Tamil Nadu 605601, India.
authors.forename: Jeyalakshmidevi
authors.initials: J
authors.lastname: Namasivayam
authors.affiliation: Dulbecco Telethon Institute and Division of Regenerative Medicine, San Raffaele Scientific Institute, 20132 Milan, Italy.
authors.forename: Mathivanan
authors.identifier: 0000-0003-0268-3610
authors.initials: M
authors.lastname: Jothi