J Korean Orthop Assoc JKOA Journal of the Korean Orthopaedic Association 1226-2102 2005-8918 The Korean Orthopaedic Association 10.4055/jkoa.2011.46.4.335 Case Report Intraneural Hemangioma of the Ulnar Nerve Kim Tae Kyun M.D. Choi Byong San M.D. Kang Hong Jae M.D. No Sung Hyun M.D. Department of Orthopaedic Surgery, School of Medicine, Wonkwang University, Iksan, Korea. Correspondence to: Byong San Choi, M.D. Department of Orthopaedic Surgery, School of Medicine, Wonkwang University, 344-2, Shinyong-dong, Iksan 570-749, Korea. TEL: +82-63-859-1360, FAX: +82-63-852-9329, bhinder@hanmail.net 08 2011 31 08 2011 46 4 335 339 23 08 2010 28 03 2011 Copyright © 2011 by The Korean Orthopaedic Association 2011

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An intraneural hemangioma is an extremely rare condition. We report here on an intraneural hemangioma of the ulnar nerve. Microscopic exploration and excision of the lesion resulted in complete relief of the patient's symptoms.

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Plain radiographs of the left wrist of a 58-year-old woman show numerous irregular shaped phleboliths.

Enhanced computed tomographs demonstrate an oval shaped mass with enhanced vessels and calcifications adjacent to the ulnar artery.

Clinical photographs.(A) A well capsulated cystic mass divides ulnar nerve into halfs and deviates ulnar artery radially. (B) Removed specimen. (C) The cystic mass is 2×1.5×1.5 cm in proximal-distal, mediolateral and anterioposteriorly respectively.

Low-power (A: PAS stain, ×40) and medium-power histologic examinations (B: PAS stain, ×100) reveal large dilated vascular proliferation and capillary-like spaces. (C) Immunohistochemical staining of S-100 protein does not demonstrate any normal neural tissue component in the mass (×100).